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No pain, no gain (or "No gain without pain") is an exercise motto that promises greater value rewards for the price of hard and even painful work. Under this conception competitive professionals, such as athletes and artists, are required to endure pain and pressure to achieve professional excellence. ==Exercise motto== It came into prominence after 1982 when actress Jane Fonda began to produce a series of aerobics workout videos. In these videos, Fonda would use "No pain, no gain" and "Feel the burn" as catchphrases for the concept of working out past the point of experiencing muscle aches. It expresses the belief that solid large muscle is the result of training hard. Delayed onset muscle soreness is often used as a measure of the effectiveness of a workout.〔https://theconversation.com/mondays-medical-myth-no-pain-no-gain-12298〕 In terms of the expression used for development, the discomfort caused may be beneficial in some instances while detrimental in others. Detrimental pain can include joint pain; beneficial pain usually refers to that resulting from tearing microscopic muscle fibers, which will be rebuilt more densely, making a bigger muscle. The expression has been adopted in a variety of sports and fitness activities. David B. Morris wrote in ''The Scientist'' in 2005, "'No pain, no gain' is an American modern mini-narrative: it compresses the story of a protagonist who understands that the road to achievement runs only through hardship." The concept has been described as being a modern form of Puritanism. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「No pain, no gain」の詳細全文を読む スポンサード リンク
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