#3: Training with light weights and lots of reps

I have seen countless number of ladies come to the gym, get the lightest possible dumbbells, crank out some hundreds of reps and go home. Most often, these women do not get the results they want. The problem with this type of training is that it does not burn many “extra” calories unless you spend a considerable amount of time in the gym. Hefting Ken and Barbie weights in the gym has a MET value of 3, which means that it burns 3 times more calories than resting in bed. Almost anything you do during the day has a MET value of 1.2 to 2. Browsing the internet on your computer has a MET value of 1.5. Realize that almost anything you do during the day (average MET = 1.5) has about 50% overlap in calorie expenditure with training with very light weights (MET = 3). If you pump super light dumbbells in the gym, only about half of the calories burned are “additional”.

Of course, you can burn a considerable amount of extra calories training with light weights but you have to really extend the duration of this type of training. Curling 5 pound dumbbells for 4 sets of 20 reps and chit-chatting for 20 minutes in the gym is not going to burn many extra calories.

Remember the rule: the less intensive the activity (smaller MET), the greater the calorie expenditure overlap with casual activities; the less intensive the activity, the more time you have to spend doing it to expend a good deal of extra calories. Always subtract a MET of 1 to 1.5 to arrive at the additional expended calories.