In general, a regular and consistent exercise time and intensity matter more than any other variable
for endurance training, so long as the intensity and duration are constant, training twice a day Every Other day will usually be more effective than training once every day
However
for resistance training, the reverse is true. it the intensity and reps are held constant, you will generally benefit more from training once a day, every day.
if you are working out in order to lose weight, you cannot, Can Not, dictate where you will lose fate. Increased exercise and decreased caloric intake can both put you in a position to burn off fat, but there is no way to tell your body where the fat will be burned From
Endurance training impairs your ability to build muscle mass. if you are trying to improve on your aerobic health while still putting on muscle, do your endurance training and your aerobic exercise on different days, and have your aerobic days be shorter but higher in intensity