If you have limited time during the week to exercise, can you just do all of your training on the weekend?
Ah, wouldn't that be great! Imagine, you can exercise only two consecutive days per week and get the same benefits of training as you would doing four nonconsecutive days per week. Alas, just as in trying to "catch up" on sleep during the weekend, the human body does not respond much more favorably in terms of accruing health benefits when exercising in such a condensed fashion. In other words, exercise frequency (i.e., days per week) is a parameter which is much more significant in terms of obtaining health benefits than exercise duration (i.e., minutes per session).
Exercising more frequently is a harbinger of a whole host of health benefits ranging from decreasing bodyfat, increasing insulin sensitivity (i.e., reducing diabetes risk), increasing bone mineral density (i.e., reducing osteoporosis risk), and increasing stamina, strength, power, speed, and endurance. Exercising more regularly decreases LDL (bad cholesterol), increases HDL (good cholesterol), increases metabolic rate, and reduces chronic disease risk (i.e., type-2 diabetes, heart disease, some cancers, obesity, stroke, gallbladder disease, and Alzheimer's disease). Additional exercise benefits include quality of life aspects: decreasing anxiety, stress, mortality, morbidity, risk of falls, and bone fracture risk. Working out more frequently rather than longer durations is simply a better approach to staying healthy and fit.
Bottom line: It's better to exercise a little each day (i.e., 10 minutes) three or more days per week than a lot each day (i.e., 2 hours) one or two days per week.
Brian Danley, CFT
"Motivation is what gets you started. Habit is what keeps you going."
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I'm a personal trainer who loves to help others fulfill their health and fitness goals. I consider myself a bodybuilder in that I live the lifestyle of eating healthy food, working out regularly, and sculpting my body.