I’ve spent the past 4 months training in a lot of gyms, and watching hundreds of people in different countries and environments train got me thinking “if I had to give them ALL one piece of advice, what would it be?” 🤔
-
I settled on slowing down their reps. I don’t know why there is such a wild obsession with “explosivity” 🤷🏻♂️ It’s like everyone has forgotten the equation F=ma, and lost the ability to observe what happens to joint control when people try to move weight quicker than they’re capable of coordinating 🧐
-
I would love to go up to the tonnes of people throwing weight around as quickly as they can and ask them what they think they’re getting out of it❓
-
The only possible argument could be that they’re training for the “athletic carry over” of moving quickly (a separate topic of suspect science that I won’t go into now), but it’s very hard to believe that such large portions of each gym consider themselves “athletes” and aren’t just training for improved strength, quality of life and aesthetics 😎
-
If anyone is under the impression that making the intended muscles contract and produce force under control at a high intensity without “explosivity” is not getting them the same gains as faster movements, please let me assure you that is not the case☝🏽
-
5️⃣ Things to consider with high acceleration movements:
- Forces at transitions increase dramatically, reducing control of the joints that aren’t meant to be moving.
- Stress placed on connective tissue to manage what muscles can’t increases.
- Resistance profiles get changed (and rarely for the better)
- “Range of motion” becomes harder to control, and thus less regular
- Load placed on muscles becomes acceleration-dependent, harder to track & thus only possible to gradually, consistently increase if you have advanced equipment to measure this with.
-
I’m not saying bouncing out of the bottom of reps and swinging into “full range” will be the death of your joints ☠️ or get you no gains. (To varying degrees) our bodies are resilient & adaptable and regardless of what you do contractions are still taking place and force is still being produced 💪🏽
-
I’m just saying it rarely makes much sense.
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【家庭醫學】~ 靜態伸展/動態伸展 (Static and Dynamic Stretching)
最近的演講中,有人問到這個問題,而且發現與會者們都很有興趣;本來還以為很多人都知道了,現在拿出來分享一下。
先來簡單定義一下靜態和動態伸展吧:
※ 靜態伸展 (Static Stretching)
靜態伸展,應該是我最早接觸到的伸展,從小學體育課老師都這樣教 (你看看有多OLD SCHOOL了)。靜態伸展時,通過維持同樣姿勢一段時間 (約15-60秒不等,重覆數次),來放鬆一塊肌肉或一組肌肉 (及附近的軟組織,如肌腱、韌帶)。
研究中,主要的好處是可以提升活動範圍 (ROM, range of motion)
※ 動態伸展 (Dynamic Stretching)
動態伸展,顧名思義,就是用一組動作,去讓目標肌群活動,以提升局部的血液供給,刺激神經肌肉連結,而達到熱身的目的。
為什麼動態伸展會越來越紅呢?其實和一些研究結果有關:
一開始,1980 年代的研究發現,運動前的靜態伸展會降低肌肉力量。後來就很多相關的研究報告指出:會造成跑步時的短跑時間減少、籃球運動員跳躍高度降低、足球運動員敏捷性降低以及精英男女運動員的力量產生減少等方面。
但是,靜態伸展並不會有長期的危害,這些肌肉力量下降也只是暫時性的;所以,我覺得拿來當運動後的收操動作是沒什麼問題的。而且,研究也指出,活動前靜態伸展的每個動作控制在45秒以內,就可以大大減少負面影響。
當然,有人說靜態的不好,就會有學者開始研究動態伸展的好處了;研究中指出,可以有效提高活動範圍、最大肌肉力量、短跑和垂直跳躍表現。另外,也有提到可以避免運動傷害。
〖小結〗
我個人建議如果是要去跟人家輸贏的時候,運動前的熱身以動態伸展為主,如果安插靜態伸展的動作,也不要單一肌群超過45秒;運動後則兩者都可以做,甚至明顯的肌肉緊繃的區域,還可以用泡棉滾筒去加強放鬆的效果。
※ 參考文獻:
1. Power, Kevin, et al. "An acute bout of static stretching: effects on force and jumping performance." Medicine & Science in Sports & Exercise 36.8 (2004): 1389-1396.
https://doi.org/10.1249/01.mss.0000135775.51937.53
2. McMillian, Danny J., et al. "Dynamic vs. static-stretching warm up: the effect on power and agility performance." The Journal of Strength & Conditioning Research 20.3 (2006): 492-499.
https://doi.org/10.1519/18205.1
3. Behm, David G., and Anis Chaouachi. "A review of the acute effects of static and dynamic stretching on performance." European journal of applied physiology 111.11 (2011): 2633-2651.
https://doi.org/10.1007/s00421-011-1879-2
4. Simic, L., N. Sarabon, and Goran Markovic. "Does pre‐exercise static stretching inhibit maximal muscular performance? A meta‐analytical review." Scandinavian journal of medicine & science in sports 23.2 (2013): 131-148.
https://doi.org/10.1111/j.1600-0838.2012.01444.x
#靜態伸展 #動態伸展
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又係Pixar呀!今次嚟到 #香港科學館 喔~
這個展覽 #彼思動畫的科學秘密 將好多彼思動畫製作的絕密全解開,由modeling, skeleton, motion...rendering,都一一詳細拆解。
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當然就咁聽係唔夠啦,仲有好多活動遊戲俾小朋友玩同實踐,其中有個Stop Motion 就最好玩,哥哥同芊芊一個導演一個監督,製作咗一部好靚的枱燈片頭(聽日再同大家分享)
最攪笑嘅係我哋全家今日錯哂DressCode,明知去Pixar展,但係都成家一齊著住鬼滅睇展覽~
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