There’s so many myth about sports and losing weight. This is 2 of them.
1) Make less than 30 minutes of sport in a row no benefit
Demystifying: This does not happen. If you play sports for at least 10 minutes each time, you can already receive benefits (not necessarily to lose weight, but you do not sport only that the sole purpose of losing weight). Obviously, do 10 minutes of sport per day is still better than not doing at all. In fact, you can withdraw more and more benefits from exercise training by increasing the duration in increments of 10 minutes (3 to 5 days per week).
So if you do 30 minutes of sport, you will see more benefits than if you made 20 minutes (which is better than 10 minutes). This is logical. Everything depends on the objectives you have set. If you start a new level of fitness, 10 minutes each time is a good goal to strive for. Gradually, as you increase your fitness level, add minutes to your training time will increase the benefits. And when it comes to sport, a reasonably prolonged activity will do you no harm.
2) Doing stretching prevents injuries
Demystifying: Even experts are not certain. The truth is that several studies conducted over several years, studied the stretch and researchers are still struggling to decide. An American study in 2004 concluded that studies on this topic do not provide conclusive evidence that stretching alone can reduce or prevent injuries related to sports.
Most studies on stretching are carried out in tandem with the business of heating, while the benefits of stretching alone can not be isolated. However, a warm-up routine that includes stretching light can help increase blood flow to the muscles and prepares them for sport.