Four seconds of intense intervals, repeated until they amount to a minute of total exertion, led to rapid improvements in strength and fitness in middle-aged and older adults. By Gretchen Reynolds from NYT Well https://ift.tt/3o0IoE5
Four seconds of intense intervals, repeated until they amount to a minute of total exertion, led to rapid improvements in strength and fitness in middle-aged and older adults. By Gretchen Reynolds from NYT Well https://ift.tt/3o0IoE5