The lifter will continue to get stronger until his/her maximum capacity has been reached, or the stress stays the same, at which point the lifter’s strength will simply plateau. The lifter adds 20 pounds and continues with the newly established stress of 170 pounds. After 2 weeks of lifting this weight, the lifter notices the 150 pounds feels easier during the lift and afterwards causes less fatigue. As a result of the adaptation, more stress must be applied to the system in order to stimulate improvements, a principle known as the overload principle.įor example, a beginning weightlifter performs squats with 10 repetitions at 150 pounds. As these subsequent adaptations occur, the stress previously experienced during the same activity, feels less stressful in future sessions. Physical stress, such as walking at a brisk pace or jogging, places increased stress on the regulatory systems that manage increased heart rate and blood pressure, increased energy production, increased breathing, and even increased sweating for temperature regulation. Perhaps a better way to relay the same message would be to say that improvements are driven by stress. ![]() ![]() ![]() If that were true, exercise would be a lot less enjoyable. \)Ĭonsider the old saying, “No pain, no gain.” Does exercise really have to be painful, as this adage implies, to be beneficial? Absolutely not.
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