To keep pace with metabolic changes, your daily menu at 40 could include everything you ate at 30, minus that tablespoon of butter!
However, cutting more calories every ten years gets trickier, and limiting food intake alone isn't the healthiest approach, anyway.
Between our 20th and 70th birthdays, most of us lose about 30% of our muscle cells.
Loss of muscle mass is the main reason metabolism slows down in the first place, since resting metabolic rate is directly related to lean body mass that's mostly muscle.
本来，肌肉数量的减少是新陈代谢减缓的主要原因 。这是由于停滞的新陈代谢率与大部分为肌肉的“瘦肉组织”直接相关 。
Maintaining or increasing muscle mass through strength training ups your metabolism and burns more calories, even while you're sitting on the couch!
Two or three sessions a week, using free weights or equipment at a gym, will do the trick.