Are you one of those so-called "armchair athletes" who follow your favorite sports team's every game cheering along but do not physically play the game? Although a recent study suggests that watching sport can make you fitter, it is time to stop staying on the sidelines and ＿＿（21）＿＿ . According to research, viewing other people exercise increases heart rate and other physiological measures as if you were working out yourself. However, if you are truly health ＿＿（22）＿＿ , it is even better and more effective to put it into practice. Playing a sport is not only fun but also boosts fitness and improves self-confidence. Learning a new sport can be tough and challenging. ＿＿（23）＿＿ your body and mind to follow the rules and specific movements might be a challenge at first, but regular practice will make this easier. For example, swimming has been known to be beneficial to those who suffer from asthma. Swimming improves good lung capacity and learning to swim can help asthmatics develop ＿＿（24）＿＿ as well. The key to finding a sport you like is to try your hand at something you think you might like to do. Since you spend lots of time watching your favorite sports, why not try one of them first. This will increase your appreciation of that particular sport and also give you ＿＿（25）＿＿ experience of what your favorite athletes are going through out there. If you feel that it is not for you, then try your next choice. Repeat until you find something that you like. After all, cheering on your favorite team is great, but playing and experiencing some of it yourself is deeply satisfying.