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Viete, aký je rozdiel medzi papyrusom a pergamenom?

Napísal femme 26. február 2023

Papyrus a pergamen boli prvé mäkké materiály, na ktoré ľudia písali svoje múdrosti a hlúposti... Vzácnosť papyrusu dokladá existencia palimpsestov...

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Zdroj foto: Book of the Dead of Hunefer, Wikipedia.com

Papyrus

Už pred piatimi tisíckami rokov poznali pisári atrament, pero a mäkký materiál na písanie. Tým materiálom bol papyrus. Za jeho existenciu možno vďačiť rastline s názvom šachor papyrusový. Uvedená rastlina vytvárala bohaté porasty v močarinách okolo Nílu a šikovní Egypťania zistili, že z jej vláknitých stvolov sa dá vytvoriť zaujímavý materiál - papyrusový "papier". Tenké plátky narezané z drene šachora položili na seba, čím vytvorili rovnú a pružnú plochu, ktorá sa potom sušila tlakom a nakoniec leštila. Vo finále sa škrobovým lepidlom zlepilo asi dvadsať pripravených papyrusových listov a vznikol viacmetrový zvitok. Výroba papyrusu bola štátnym monopolom a od tretieho tisícročia sa papyrus vyvážal z Egypta do celej oblasti Stredomoria. Samozrejme, papyrus bol veľmi drahý a predstavoval pre staroveký Egypt značný zdroj príjmov. Vzácnosť papyrusu dokladá aj existencia palimpsestov, t.j. opakovane používaných papyrusov, z ktorých sa zmyl predchádzajúci text, aby sa na ne dalo znovu písať.

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Pergamen

Slovo pergamen vlastne znamená "koža z Pergamonu" (mesto Pergamon patrilo k najdôležitejším mestám starovekej maloázijskej Mýzie). Keď sa v druhom storočí pred našim letopočtom Pergamon rozkmotril s Egyptom a ten prestal dodávať vzácny papyrus, museli sa pergamonskí pisári preorientovať na iný druh podkladového písacieho materiálu. Z núdze teda upriamili pozornosť na kožu, ktorá sa už aj predtým používala na písanie. A začal sa vyrábať pergamen: z dôkladne spracovanej kože oviec, kôz a teliat; prípadne z gazelej, antilopej alebo pštrosej usne. Ovčia a teľacia koža však mali jednu výhodu - dalo sa na ne písať z obidvoch strán. No najkvalitnejší bol takzvaný velínový pergamen, ktorý vznikal z kože veľmi mladých či dokonca ešte nenarodených teliat. Zvitok papyrusu tak nahradil list pergamenu... a zrodila sa viazaná kniha...

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Zdroj foto: Wikipedia.com

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  • Komentár digitalafterlife.org %AM, %27 %299 %2025 %06:%mar napísal digitalafterlife.org

    They say it helps with heavier lifts, is beneficial
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  • Komentár gitea.jasonstolle.com %PM, %24 %944 %2025 %21:%mar napísal gitea.jasonstolle.com

    Selecting between the hack squat and leg press could be confusing, particularly if you’re
    unsure which one is best for you. With leg presses,
    the load is loaded completely on the underside of your feet.
    There is not any engagement of the torso musculature wanted, no
    effort exerted into sustaining proper upper body posture.

    As you push the burden away, your legs lengthen smoothly, with your back absolutely supported and
    minimal want for core engagement. This managed motion makes it
    easier to raise heavier weights without worrying about steadiness.

    While the leg sled and hack squat are wonderful workouts, do not neglect that a balanced exercise routine is
    important for total fitness. Incorporate quite a lot of workouts
    targeting completely different muscle teams, together with
    squats, lunges, deadlifts, and leg presses.
    Thanks to its movement pattern and the broad range of motion, you may really feel the depth with
    only a few plates on all sides. It Is the standard of the train, and the
    depth you probably can reach that amplifies the issue, not
    necessarily the amount of the weight. The hack squat, when accomplished right, could be
    a game-changer in your lower physique exercise.
    Guaranteeing your kind is spot-on to reap its full benefits and avoid unwanted pressure.
    Particular consideration to the hack squat foot placement can spell
    the distinction between an efficient exercise and
    one that risks damage.
    Whereas getting a nice amount of hip flexion, the leg press just isn't
    as efficient for hip extension, meaning it needs different
    workout routines to target the glutes. You can do a leg press in any stance you like; narrow to extensive, or high to low.
    For those with knee injuries, leg presses are an efficient way to coach the legs with less force through the joint than different workouts just like the knee extension.
    The average business health club can also stock
    normal squat racks and should not have the machines for hack squat exercises.
    This article will provide a breakdown of each
    actions, together with pros, cons, and how to perform
    each. We’ll also answer some of the commonest
    questions folks have about these in style workouts.
    Variations include single-leg hack squats, reverse hack squats, narrow
    stance leg presses, and broad stance leg presses.
    These variations can goal totally different muscle groups and add selection to your exercises.
    The leg press and hack squat are two of the most popular leg workouts.

    In addition, they're great accessory workouts for back squats and entrance squats.
    With hack squats, your toes remain firmly in place on the platform, and your legs extend to raise your bodyweight plus the
    weight loaded onto the machine/barbell.
    It might help you or your members stay motivated and excited for leg day,
    because it offers versatility and the chance to target
    multiple muscle teams with one machine. In addition to offering a safe and efficient means of performing leg workouts, a leg
    press machine enables progressive overload. This means you'll find a
    way to improve the weight as you get stronger, continuously challenging your legs.

    Both the leg press and hack squat mainly target the quadriceps, hamstrings,
    in addition to glutes. Nevertheless, the hack squat is a more well-rounded train because of its upright stance and stabilization necessities, which
    engage the core and decrease again. Here’s a have a glance at
    one of the best hack squat machines for house and industrial gyms.


    Pausing at the bottom will help to maintain your vary of movement consistent all through.
    Resting at the prime will take away pressure from your quads, making them tougher to complete.

    Since you’re locked into the machine, there isn’t an excessive quantity of that may go wrong with the hack squat.
    You should obviously try to choose a great weight, so you’re not overexerting yourself while also challenging your physique sufficient.

    Leg presses are beloved by lifters all over the place whereas hack squats are a fantastic addition to your lower
    body train arsenal. Although there are some important variations between hack squats and leg presses, it is hard to
    go wrong with both when you're making an attempt
    to blast the muscle tissue of the decrease physique.

    There are many different varieties of leg press machines with the commonest
    being the horizontal leg press machine.
    This means your motion is delegated to a particular motion pattern, removing the necessity for stabilizers.
    You also can embody the fact that the leg press is very customizable for a machine exercise.
    Many weightlifters’ quads aren’t up to par, which impacts different lifts and general lower physique features.
    Improving your quad strength will help your explosive vitality, your other massive lifts (such as deadlifts and squats), and your working and jumping energy.
    Since you don’t should concentrate on stabilizing elements, you possibly
    can higher have interaction the quads. As with any exercise,
    there are widespread pitfalls that may detract from the standard of
    your hack squat. You wouldn’t just seize the jumper cables and hope for one of the best; as an alternative,
    you should join them correctly at both ends.

  • Komentár Testosterone Withdrawal Side Effects %AM, %24 %511 %2025 %11:%mar napísal Testosterone Withdrawal Side Effects

    (Again, if that is your goal.) If you wish to construct
    muscle, modify your calorie intake and strength-training exercises accordingly.
    If you’ve been sleeping on the step-up, it’s time to
    get up and add them to your glute exercise. A examine from
    2020 discovered that the step-up had the very best gluteus maximas muscle activation amongst a few of the best
    glute-building exercises. You could make hip thrusts more difficult with a resistance band
    or barbell. For example, you can set your self up
    and position a loaded barbell towards the crease of your hips.
    Hold the bar for stability and perform the exercise as you usually would.


    The best glute exercises ought to target all three sections of the total gluteal muscle group.

    And these workouts aren’t limited to the glute max-focused strikes
    just like the Bodyweight Squat or quad-dominant actions
    just like the Lateral Lunge. You can’t really feel it immediately, but
    it’s situated towards the side of your hip, right beneath the gluteus medius.

    When you stroll, run, or even simply stand on one foot, it’s your gluteus medius that
    helps keep your pelvis steady and prevents you from toppling over.
    And when there’s a excessive stage of activation, you’ll have the power to generate a more powerful contraction of the glute muscle tissue.

    Beneath, I present an overview of glute muscle anatomy to assist you perceive how one of the best glute workout routines
    work. Beneath are a few of our hottest workouts and coaching programs for larger, stronger glutes.

    When you squat, especially if you’re not used to activating your glutes properly,
    you might end up placing all of the load on your quadriceps.
    This can lead to muscle imbalances and a failure to essentially get those glutes working.
    Adding a mini band essentially forces the glutes to get involved in the motion, leading to better glute-shaping results.
    When most individuals take into consideration the glutes, they’re really excited about the gluteus maximus, which is the
    most important of the muscular tissues within the gluteal group.


    In general, building muscle takes a lot of work, however you're at least able to
    choose where you achieve muscle. If this feels too straightforward, attempt holding a dumbbell in each hand or
    a heavy kettlebell in one hand to additional challenge your
    stability. Additionally, it’s necessary not to overwork your glutes in hopes of
    sooner results. I chose the hip thrust as #1
    due to its imply EMG being larger, its capability to
    use greater hundreds, and the promotion of the literal "Glute Doctor," Dr.
    Bret Contreras. In reality, the EMG shows to what degree a muscle is
    utilized in a motion. Though crucial, it have to be
    considered in conjunction with the load you'll find a way to raise.
    Let's dig via the analysis to see what exercises you want
    to be doing.
    Regardless Of the scary sounding name, deadlifts are literally fairly simple when you get the grasp of them.
    The Journal of Strength and Conditioning revealed
    research which said that deadlifts help to coach the gluteus maximus, so we couldn’t depart them out of the
    round up. There are many various variations,
    however we’ll clarify the way to do a Romanian deadlift with dumbbells.

    The instability of the ball requires extra activation from each the core and
    glutes, making it an exceptional exercise to reinforce strength in these areas.
    Next, drive via your heel and carry your hips up in the
    direction of the ceiling whereas squeezing your
    glutes on the prime of the motion. By performing this train on just one leg,
    you'll have the ability to isolate and intensify the contraction in particular areas of the
    glutes. This train includes stepping up onto a excessive field whereas holding weights,
    which challenges your steadiness and stability.
    Hip thrusts could be carried out in your home health club or at a business fitness center, utilizing any kind of bench to help your
    back and hips. Deadlifts can actually do it
    all, and that’s why they’re the go-to train for many weightlifters and athletes of any caliber.
    Lowering the burden down against gravity instead of
    pulling it up creates a special challenge for the glutes and hamstring.

    I’ve been informed that I have a weak glute medius by
    my pt and that’s what is causing so many of my leg points prefer it band
    syndrome, overpronation, patellar ache, and
    so on. It began with an old knee harm then simply years of being a couch potato and never rehabbing it properly made it worse.
    They gave me workout routines like aspect mendacity leg raises,
    clam shells, and monster walks which do work my glute
    medius. I’ve even watched videos on tips on how to adjust these workout routines to increase glute med
    activation. For all these reasons, you should make these glute training exercises a part
    of your program. I promise it’s going to accelerate your performance on those bigger lifts.

    To do this, I'll primarily examine two variables, EMG readings and cargo lifted.
    And whenever you're prepared up the challenge, maintain a pair of
    dumbbells for extra resistance. In reality, growing your
    glutes is a continuous process and can more than likely by
    no means be accomplished. Performing a dumbbell front carry or sandbag
    carries will get you the activation you are in search of. The Zercher carry
    utilizing a barbell can be a fantastic front carry possibility.
    Additionally, the core stays engaged all through this transfer,
    strengthening the belly muscular tissues as well.
    This exercise not solely challenges your outer thighs and gluteus medius, but also your core stability muscular
    tissues to assist enhance your steadiness.

    When you get comfortable with a Romanian deadlift, you can begin doing single-leg RDLs for a good tougher gluteus
    maximus exercise, Katie says. But first, make certain you can do the essential motion with perfect kind.

    A 2020 study found that a six-week train regimen of donkey kicks and squats built gluteus maximus and
    gluteus medius muscular tissues and lowered bottom
    fat in young ladies. Your gluteus maximus is worked in hip extension in this train, while your gluteus medius and minimus have to work
    to maintain hip stability because of the single-leg place.
    Being carried out on one leg at a time, the
    step-up is one other train that challenges your gluteus minimus and medius in hip stabilization while nonetheless performing hip extension on your gluteus maximus.
    It can additionally be one of our strongest hip extensor muscles and is probably one of
    the prime movers in running, jumping, and strength training exercises like the squat and deadlift.
    The gluteus medius and minimus are most essential in moves that require abduction,
    or movement away from the middle of the physique. With lateral banded walks, you target the glutes in addition to the hip muscles.
    In this article, you'll discover ways to train your glutes effectively.

    That Is one part of it, however all that does is increase the load, which could be accomplished by including weight.
    One Other meta from 2020 discovered that out
    of all exercises, the hip thrust had the second highest EMG activation with a mean of 75.41% (but the very best was 94%)2.
    Nevertheless, I put this move in first place as a outcome of its high muscle activation and heavy masses.
    Houdyshell additionally does a superb job of pairing compound workouts, like squats or lunges, with smaller isolation movements
    like kickbacks and pulses. This provides you an opportunity to "recover" a little from a cardiovascular standpoint, even if your
    muscular tissues are burning by the end of the set. Glute activation refers to activating, or "firing up" the
    glute muscles.
    Step-ups on a chair, a bench, plyo field, or some other sturdy floor at least 1.5 to 2 ft off the ground are additionally glorious methods to target your glutes.

    This next half could scare off a few of my readers, but these of you who keep will
    reap the rewards. Apart From, this may be a great approach to weed out those who are severe about building larger glutes by way of
    exhausting work, perseverance, and dedication, from those that are on the lookout for a fast repair.
    Attempt to maintain the knee of your standing leg centered over the ball of your foot—don't lean it too far ahead,
    inside, or exterior. You should get the positioning right for this train to target the proper muscle tissue.
    Consult a physical therapist for assist with positioning and train prescription if
    you're having hassle. This information has illuminated the pathway to sculpting the
    glutes you've at all times aimed for.
    As a bonus, you’ll also get some superior tips in this video on the method to
    squat correctly to get essentially the most booty-building advantages.
    And that’s a fairly large deal, because it’s
    the principle muscle involved in stabilizing your hips, in addition to rotating
    them both externally and internally. A great spot to begin is by maintaining a report of how much you're lifting with each train and making an attempt to lift somewhat bit heavier the following time.


    What makes barbell hip thrusts so superior is that you simply
    place the load immediately on your hip joint. In my professional opinion, all of those are
    nice for constructing muscle and deserve a spot in your exercise
    break up. That Is why I put collectively this entire
    information to explain everything you should know to successfully construct your glute muscles.


    As the name suggests, the gluteus minimus is the smallest gluteal muscles.

    It Is a deep muscle beneath the other gluteal muscular tissues and tensor fascia latae that starts on the ilium (hip bone) and travels to the femur.
    The gluteus minimus is similar to the gluteus medius in structure and performance.

    I Will also address some of the common questions asked
    and provide steering on fixing that saggy underbutt and toning
    the realm up. Weekly information solely for people who need to improve their health, fitness and
    mindset. If you're working them out every single day, be certain to're not overworking them to
    the point of exhaustion or harm. If you reside a sedentary way of life, it might take several weeks so
    that you can build that neuromuscular connection.
    Working out the identical muscle group too usually is counter-productive.
    After breaking down the muscle fiber you should give
    the muscle tissue sufficient time to get well and grow.
    If not, it will lead to muscle shrinkage quite than muscle growth.
    Glutes are a pretty big muscle group and wish extra time to get well
    than other upper physique muscular tissues. Therefore, when doing
    the bigger butt workouts, practice them not extra
    than twice per week so your butt muscles have time to grow.

    If you have not been doing glute workouts that focus on all 3 glute muscles, it's time to start.
    Your packages should all the time characteristic a number of the greatest and finest butt workout routines, such as squats and hip thrusts.
    After your prime motion, swap around the accent workout routines
    within your program to hit the glutes from all angles.

    For instance, you may stick to the principle articles featured here, but then after 12 weeks, consider
    adding in Bulgarian break up squats to maintain your leg growth going.

    Not only will the curtsy lunge recruit the smaller gluteus
    medius and minimus muscular tissues, it’s additionally highly customizable relying in your degree.
    While you will get some great gluteal activation out of compound barbell actions, these lifts aren’t the simplest
    to carry out, particularly if you’re new to the gym.
    While your buttocks are made up of many muscle tissue,
    the largest of them are the gluteus maximus, medius, and minimus.

    In a staggered stance, you really have to use your glutes to stabilize your physique.

    The stance additionally forces the glutes on the entrance of your legs to work even tougher.
    Lunges additionally work other muscle tissue including your hamstrings, quads, and calves.
    As you'll be able to see, it’s important to maintain your glutes strong and toned—and these are ten of one of the best
    glute workouts to do just that.
    If you wish to build stronger glutes, you may wish to do workout routines and activities that concentrate on those muscular
    tissues. The "glutes" are actually three completely different muscles—the gluteus maximus
    (the largest muscle), the gluteus medius, and the gluteus minimus.
    Hip thrusters primarily target the gluteus maximus through hip extension.
    Booty, booty, booty rocking all over the place is going to
    be your new theme song if you stroll into a room after mastering these best glute isolation exercises.
    If you're looking to build a robust, agency backside,
    look no further. In this submit, we cowl every thing about glutes, together with; the anatomy
    and performance, benefits of training them,
    plus 11 of the best glute isolation exercises.

    The lower glutes play a vital position in stabilizing the pelvis throughout actions
    such as strolling or working, and weak glutes can result in ache and muscular imbalances.
    Bend the right knee 90 degrees and the left knee at
    90 levels, trailing behind you. Come out of the lunge with a
    protracted stride by stepping the left foot forward into a lunge.
    If you're new to train, start with dips before moving into deeper 90-degree lunges.

    Protein especially is essential for muscle development and the
    repair of muscles after a workout. Discovered deep in the buttocks, the gluteus medius helps to abduct and internally rotate the thigh at the hip joint.
    A saggy butt is when your buttocks lack definition and muscle tone in the large glute muscles.
    The cause is that the facet glutes (the medius and minimus) are only small
    muscular tissues and dedicating an entire 45-minute exercise to them is excessive.

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