Physical adaptation our bodies adapt themselves to our calorie consumption and physical activity levels. when we begin an exercise regime, our body is required to make several changes to adjust to changing workloads. our muscles have to rebuild themselves and this requires many calories. but, over time the body finishes adapting and burns less calories for the same activities. solution: don't allow you body to adapt. vary your exercise program by changing the intensity, duration, frequency and type of exercise. if you always do weights then go do some cardio, grab a jump rope and skip for 15 minutes. you can also utilize interval training where you swap and change between different types of exercise for set amounts of time.