Aj na lásku existuje vzorec

Všetci hľadáme toho pravého. A presne v tomto bode prichádza na scénu matematička Hannah Fry, ktorá vychádza z tézy, že láska je presne tak ako väčšina nášho života plná rôznych vzorcov.

Či už ide o počet sexuálnych partnerov alebo o to, komu napíšeme na internetovej zoznamke, tieto vzorce nám život obracajú hore nohami ako láska samotná. Ale všetky sa dajú matematicky odhaliť. Presne o tom píše v novinke Matematika lásky.

Neexistuje téma, ktorá by priťahovala viac pozornosti, času a túžby, ako láska.
Láska je zdrojom inšpirácie nespočetných obrazov, vojen, básní a hudobných skladieb. Presne tak isto ako sa poézia, umenie a hudba snažia povedať o láske to, čo je ťažké vyjadriť slovami, robí to aj matematika. Samozrejme, matematika nám nemôže vysvetliť emocionálnu povahu lásky – emócie sa vôbec nesprávajú usporiadane, racionálne a predvídavo.
V knihe Matematika lásky nás Hannah Fry pozýva na fascinujúcu cestu po vzorcovh, ktoré definujú náš život, a púšťa sa do súboja s najčastejšími a najzložitejšími otázkami, ktoré s láskou súvisia:
Aká je šanca nájsť si lásku?
Ako presne fungujú online zoznamky?
Kedy by sme sa mali usadiť?
Ako sa vyhnúť rozvodu?
Kedy je správny čas na kompromis?
Môže nám teória hier pomôcť rozhodnúť sa, či sa po prvom rande ozvať?

Hannah Fry sa s humorom a zároveň aj s vážnosťou, ktorá téme hľadania životného partnera prináleží, zamýšľa nad tým, ako nám môže matematika pomôcť pri problémoch s láskou.

Matematika lásky je ďalšia zo série
TED knihy: malé knihy, veľké myšlienky

Pravda o počte sexuálnych partnerov

Vedci už dávno zistili pomocou niekoľkých prieskumov, že priemerný počet sexuálnych partnerov bol vlastne celkom nízky: okolo sedem pre heterosexuálne ženy a okolo 13 pre heterosexuálnych mužov.
Ale predtým než začneme oprašovať staromódne teórie o promiskuitných mužoch a cudných ženách, tí bystrejší z vás môžu spochybniť tento nepomer. A mali by ste na to právo. V skutočnosti je na svete zhruba rovnaký počet heterosexuálnych mužov a žien a sex by mal nastať medzi dvomi ľuďmi, priemerné číslo pre mužov aj ženy by teda malo byť také isté. A namiesto toho sa rozdiel medzi priemerom mužov a žien postupne zvyšuje, ako dokazujú podobné prieskumy.
Na vysvetlenie tohto rozdielu existuje pár možných odpovedí. Možno majú muži tendenciu preháňať (alebo „klamať“ ako sa tomu hovorí v knihách). Možno majú muži a ženy rozdielne definície toho, čo sa musí stať, aby si pridali nového človeka do zoznamu.

Trochu presvedčivejšie vyznieva argument, ktorý súvisí s faktom, že tu môžu byť nejaké ženy s veľmi vysokým počtom sexuálnych partnerov, ktoré sa štúdií nezúčastnili. Predstavte si, že by ďalšia žena, ktorú by oslovili, spala s 3 000 ľuďmi. Len táto jediná informácia by stačila na to, aby zvýšila počet všetkých oslovených žien zo sedem partnerov na osem – znovu zvýrazňujem veľký problém využívania aritmetického priemeru ako reprezentanta priemeru.

Ale možno oveľa dôležitejšie je to, že muži a ženy pristupujú k číslam rozdielne. Ženy rátajú vzostupne, vymenúvajú partnerov: „No, tak Harry, potom Zayn, potom Liam...“ Takto sa dá dostať k presnému zoznamu, ale ak na niekoho pri rátaní zabudnete, ste náchylné znižovať počet svojich partnerov.
Na druhej strane muži bývajú približnejší. „No... Povedzme, že päť ročne za posledné štyri roky.“ Aj toto je prijateľná metóda, ale sem-tam riskujete preháňanie. Túto teóriu posilňuje zistenie, že prekvapivé množstvo mužských odpovedí je deliteľných piatimi.

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    If doing rows seated, adjust the seat to the right height so
    your chest is against the pad and you can row comfortably.
    For taller lifters, you can even do Hammer
    Seated Rows standing as well. Decrease the seat out of the method
    in which and discover a snug position in your toes to face.
    Lat pulldowns are another exercise for again strength,
    successfully concentrating on the again muscle tissue and enhancing general again health.

    Meadows rows are another exercise for back
    strength, targeting the back muscular tissues and promoting muscle development and improvement.
    Incorporating these alternatives provides variety, reduces the chance of injury, and nonetheless effectively targets the again muscular tissues.

    Consequently, the t-bar row requires much less core muscle activation and postural stability, which permits you to instead isolate the muscles of the again to a greater
    extent. As well, I even have included a selection of barbell,
    machine, and body weight variations so that you can add to your collection of
    back workout routines. In this article, I’ll dive into every of those workout routines in additional detail, together with
    why it makes a super different to the t-bar row, the method to do it correctly,
    and some tricks to maximize its advantages. Just like with lots
    of the rowing exercises above, concentrate on a correct starting position with the back flat and maintain the
    core braced throughout the row. In the occasion that another exercise just isn't
    essential, a easy tweak in the gear used for the barbell row
    should greater than suffice for the needs of the exerciser and their training objectives.
    Verify out this video for a useful visual information to performing resistance band
    bent-over rows. Using a supinated (underhand) grip permits
    you to target the lats and rhomboids to a higher diploma, similarly to a neutral
    grip T-Bar row.
    Rear delt rows may be performed with dumbbells, barbells,
    cables, or resistance bands. Unlike the traditional
    barbell row, the pendlay row starts from the ground. The bent over row is an exercise that strengthens the muscular tissues of your middle back.
    This carry also has the extra benefit of working your latissimus dorsi, or lower back, and
    the muscles in your arms. Incorporating this raise into your weekly train routines
    will strengthen your back and improve your posture.
    The purpose being is that this exercise has a really similar setup to the bent-over barbell
    row; however, your palms are in a neutral position versus pronated.
    Inverted rows are a compound horizontal pulling movement where the exerciser suspends themselves chest-up from a bar
    or similar object. This allows for them to fairly literally
    row their own physique – appearing as an effective alternative
    in conditions where no barbell or different forms of equipment are present.
    In comparability to bent over rows, the T-bar
    row places a higher emphasis on the latissimus dorsi and targets the again stabilizer muscular tissues to
    a barely larger extent. Pendlay rows are similar to bent-over rows, however
    they’re somewhat easier in your decrease again. With Pendlay rows,
    you set the bar down on the floor between reps, giving your back and grip
    a short relaxation.
    What’s more, as a outcome of all the resistance comes from one side,
    various muscles in your torso should work tougher
    than regular to maintain your physique stable. Nonetheless, certainly one of
    its primary downsides is that the strength of the muscles in your decrease again could
    be a limiting issue, especially if you’ve accomplished squats or deadlifts earlier
    in the workout. This variation reduces stress on the decrease
    again by positioning you prone on an inclined bench. Performing
    unilateral workout routines might help make sure that both sides of your
    physique are equally sturdy and muscular. Since you're seated on a machine, you've extra help that would otherwise be the responsibility of the stabilizer muscles.
    I hope at least considered one of these Barbell Row alternatives I’ve listed right here is an efficient fit for you and
    your workout routine.
    The bent-over row variations embody the Pendlay row, the Smith machine bent-over row,
    and other high-level variations. Nevertheless, a common mistake is not beginning
    with a decrease weight when performing it for the first time – doing that may assist prevent accidents.
    Your elbows shall be closer to your torso, along with your arms closer together.
    You’ll even be pulling the bar to your lower stomach – decrease than with a daily bent-over grip.
    A hamstring is a group of muscle tissue positioned on the again part of your
    thigh. It performs a supportive function by stabilizing the hip joint and helping to hold up proper posture and
    steadiness in the course of the motion. The bent-over row primarily works
    the rhomboids, trapezius, teres minor, teres major, infraspinatus,
    and latissmus dorsi.
    As the back is such a giant group of muscles to get an efficient again workout it’s
    essential to include quite so much of different workouts for complete muscle
    activation. The seal row goes to work your mid back muscle tissue, particularly the lats.
    The seal row is a motion accomplished along with your body in a susceptible place elevated on a bench.
    When doing this exercise it’s important to keep your weight distributed between each legs and preserve a impartial spine and neck with your shoulder blades squeezed collectively.

    The downside with barbell bent-over rows is that there may be a tendency to do them with a rounded again. This puts an amazing quantity of stress on the spinous ligaments and intervertebral
    discs. You can push your self as onerous as attainable, and
    the one factor that’s going to get drained and fail, are
    going to be the target muscles rather than different supporting
    muscular tissues.
    The barbell bent-over row is the obvious alternative
    as a substitution for the Smith machine row. It emphasizes the very same major muscle
    groups as the Smith machine row. This helps strengthen the again muscular tissues,
    specifically the latissimus dorsi (lats), rhomboids, and trapezius muscles
    (traps). Look for an exercise that allows an identical lengthy vary of motion to totally stretch and contract the back muscular tissues.

    In Addition To that, if you are interested in strengthening upper body muscles, the treadmill is likely not
    what you may be on the lookout for. That signifies that the pull-up bar won't really give you very big benefits when it comes to making an attempt
    to improve cardiovascular well being, strengthening leg
    muscular tissues, and so on. To do that train you want a pull-up bar which is mainly a sturdy horizontal bar.

    One good factor about lat pulldowns is the flexibility to adjust
    the resistance to suit your health stage. By changing the load or
    using several sorts of resistance bands, you can increase or decrease the challenge, ensuring that you just
    continue to make progress in your back power and improvement.

    Every workout has its place in your routine, and there’s
    rarely a necessity to switch one routine with another. The bent-over row variations will help with particular muscles that the barbell bent-over row could
    not, and vice versa. The Barbell Bent-Over Row is, in any case, a Bent-Over Row variation, and
    it’s certainly one of several that lifters
    can include of their routines. Put the dumbbells on the floor and raise your self into
    an upright plank place whereas keeping your arms straight above the dumbbells, holding onto the bars.
    Carry one dumbbell at a time and row your arm up straight behind your torso.

    This compound exercise additionally recruits the core muscle tissue to provide
    stability and support in the course of the motion. If you're in search of a substitute
    for the bent-over row to keep away from pain, manage an injury, make
    do with minimal tools, or simply change things up, we now have you covered.
    Here is our record of the best barbell row options to help you build a strong, broad back.

    Transitioning to the T-bar row, this sturdy train zeroes in on strengthening
    the higher back and latissimus dorsi with a lowered load on the decrease spine.
    The engagement of mid trapezius and rhomboid muscular tissues via T-bar
    rows promotes scapular retraction and stability,
    thus serving to forestall potential shoulder accidents.

    The T-bar row is a cornerstone train for lots of bodybuilders
    and is an excellent approach to build again width and thickness.
    It’s not the simplest exercise to grasp, however it's a very rewarding one.
    Energy coaching machines have come a very great distance within the final
    a hundred years. The Place they was once massive, clunky, uncomfortable, and barely effective, they're
    now state-of-the-art and let you goal your muscle tissue with laser-like precision. With all the opposite muscular tissues you should train to construct a balanced physique, it’s simple to miss the rear deltoids.
    After all, you can’t see them within the mirror, so they’re typically out of sight and out of thoughts.


    The t-bar row is meant to primarily work the muscles of your center
    back and lats and to do so successfully, your torso needs to
    be bending forward till it’s just above parallel to the ground.

    Nonetheless, it’s an awesome different to the t-bar row as
    it’s going to work the muscle tissue of your back,
    as properly as your triceps lengthy head and rear delts.
    Nonetheless, when you don’t have entry to those, we’re going to
    suggest some alternatives for t bar row exercise that are just as efficient
    for creating a much bigger bac. It could be carried out using a barbell loaded into a landmine
    attachment or on a devoted t-bar row machine. The inverted row is a good body weight exercise for working your again muscle tissue particularly the higher back.
    Overall alternating the barbell row out of the workout routine can help prevent injuries and promote higher muscle stability and development as
    properly as being efficient at breaking by way of plateaus.

    In truth, Pendlay began doing barbell rows when he
    was competing in powerlifting.
    Here are some nice options that’ll work your legs, core,
    and back as properly as getting your heart fee up.
    In easy words, you probably can describe lawnmower pulls as a one-handed bent-over row with an extra twist
    at the prime of the motion. Get ready the place your legs
    are slightly bent, your again straight at a couple of 45-degree angle or extra to a vertical line,
    and your arms stretched. To do this train you start standing up
    over the bar which is between your legs along with your back to
    the bottom anchor level. Decide the load off the ground by using your
    legs whereas maintaining your back straight. The name
    of this exercise comes from the form this bar has due
    to the horizontal handle on the finish of the bar.

    You may have one thing like a heavy weighted vest to make the motion difficult sufficient.

    Spinal stability is also necessary for helping reduce
    pain within the neck and back, and it is essential for serving to scale back the chance of harm in and outdoors the gym.

    Resistance bands present a portable and challenging various to weights.
    I love Barbell Bent Over Rows as a back-building train,
    but generally Barbell Rows are simply not an possibility.
    The final exercise on the record isn’t a horizontal row like Bent Over Barbell
    Row, but it’s too good of an train to go away off.

    Since you are recruiting a unique part of your back that might be weaker, the
    incline dumbbell row might help enhance your other lifts and overall higher physique strength.
    The use of the bench not solely modifications the angle,
    but it additionally eliminates the flexibility to make use of momentum, which may be thought of cheating.
    The incline dumbbell row is among the workout routines that
    helps to target those usually neglected muscles due to the totally
    different angle you are pulling from. Bent over rows are a cornerstone
    exercise for building back strength and muscle
    mass. Nonetheless, they'll typically be uncomfortable or inaccessible for
    those with lower back pain or restricted mobility. There are loads of efficient
    alternatives that may present comparable advantages
    without the strain.
    The barbell bent over row provides several advantages including increased energy in the posterior chain, higher back,
    hips, and legs. These pull exercises additionally promote stability, vary of motion, and importantly help
    cut back the chance of injury. If your again is missing width, then doing more
    lat pulldowns will assist greater than a barbell row.

    Lat pulldowns place little to no pressure on the
    lumbar backbone, are great for bettering scapula positioning, and goal the lats better than any other exercise.
    An inverted row is a great bent-over row various for these
    with entry to a limited quantity of equipment. You only need
    a bar to hold from and your body weight to carry out this exercise.

    Another profit to the inverted row is you could make the exercise easier or more durable by alternating the angle of your
    body.
    Select between a four or 5 day coaching break up and
    achieve 2-12 pounds of muscle over ninety days...

    Focus on stretching your lats on the bottom and squeezing
    them on the top. Strive to the touch your elbow to your hip on every rep after which really feel for
    a full extension at the top of the movement.
    They are the main elbow flexor, which helps convey the handles all the way down to
    your ribcage.
    I have zero machines in my garage health club, but
    the one machine I would purchase if I ever find one at an honest value is a
    Hammer Iso Row Machine. Looking for an excellent DB Chest Supported Row at
    house or on the highway with minimal equipment?

    Get yourself a TRX Strap if you don’t have one already and do some
    TRX Rows. Athletes I coach like to either pull their faces
    to the bar or even elevate their chin up and over the bar like a pull-up.
    The solely downside to Barbell Bent Over Rows is you lose the
    chest help.
    Even the preliminary investment is usually decrease
    in comparability with the identical rowing machine stats.
    This signifies that when you decide to cease using dumbbells or different
    free weights you probably can doubtless sell them for a really similar price as what
    you set into them. Using this machine might look a bit difficult at
    first however this exercise is definitely very beginner-friendly.

    You may need to find an elevated bench or use boxes to raise the bench to carry out this motion. Using 25-pound plates will allow a greater range of motion than utilizing 45-pound
    plates. The objective of the lats is to move the upper arm down and inward in the course of the hip.

    To perform a repetition of Yates row, the lifter will pull a loaded barbell off the
    floor with the palms set shoulder-width apart
    using both an underhand or overhand grip. The T-bar row is most frequently
    employed as a bent over row alternative in instances the place a pronated grip, insufficient lat ROM or insufficient loading
    capacity are an issue. However, when you do discover that the standard barbell bent over row causes issues for you, any of the seven bent over row alternate options will provide a good substitute.
    Posterior deltoids – while barbell bent-over rows are
    most undoubtedly a back exercise, your shoulders are additionally involved.
    Of the three deltoids, the posterior or rear head is most
    lively throughout this train.

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