Cardiovascular or cardio-respiratory endurance or aerobic fitness, is the ability of the heart and lungs to deliver oxygen to the body's tissues during sustained physical activity. Muscular endurance is the ability of a muscle, or group of muscles, to perform continuously without fatigue. Weight training can be performed with free weights, such as barbells and dumbbells, or by using weight machines to increase the muscular strength.
Weight training is a targeted exercise program that typically focuses on muscle building exercises, which leads to greater muscle strength. Cardiorespiratory exercised are generally sustained activities that improve heart and lung functions.
