Fitness is divided in two types: Aerobic and Anaerobic.
Aerobic fitness aims to improve oxygen consumption. The benefits from Aerobic exercises go directly to the lung’s function and heart’s activity. They are perfect for cardiovascular workout and loss of body fat. The downside of it is loss of muscle mass and strength. Aerobic fitness includes running, bicycle riding, swimming and rowing.
Anaerobic Fitness aims to build muscle mass and increase strength. The disadvantage of is small amount of cardiovascular exercise and little loss of body fat. Activities involving anaerobic exercises are weight lifting and sprints.
Whatever fitness type you choose, you won’t make a mistake. The only mistake is if you prefer one thing more then the other. Don’t concentrate on Aerobics more then Anaerobic, or vice versa; muscle building and strength crafting requires presence of oxygen; the entire aerobic workout needs muscle strength and agility. So the best thing is to combine these types in your workout routine.
For instance, start your gym workout with 10 minutes of running on the treadmill; continue with weight lifting; and then finish with another 10 minutes of treadmill running. Switch the aerobic exercises from running to stationary bike riding from time to time.
There will be days when you won’t feel like lifting weights, so, do some aerobic exercises. Their oxygen supply will do wonders the next day weight lifting is back on schedule.