Increased muscular endurance can only be achieved by combining strength and endurance activities, and following a sound nutrition program. When you want to increase muscle size and mass, you'll need to incorporate several strength-training and cardiovascular routines into your workout routine and maintain consistency over several weeks in order to see and feel the results. Different sports require various levels of flexibility, and the best way to increase strength in a short period of time is to invest the effort and energy into trying new sports and optimizing your form and performance in each; this allows you to avoid a workout 'rut' and also experience significant muscle gains in a short period of time.

Michael Carrera and Tudor Bompa, authors of the book "Periodization Training for Sports" advise athletes who want to develop muscular endurance to perform many repetitions against a specific resistance for a long period. But if you want to develop strength and stamina, you should do explosive movements that work up several core muscle groups at once and push your muscles at their limits. Tudor and Michael add that athletes should focus on these critical training elements: agility, flexibility, aerobic endurance and coordination.

Improving agility is a task all bodybuilders should focus on because it increases the core muscle groups' range of motion and aids in building up cardiovascular endurance. Activities that improve agility include football, soccer, figure skating and gymnastics. These activities require a person to combine speed, flexibility and strength at irregular intervals, which improves the efficiency of our heart and lungs.

Increasing endurance is accomplished with exercises that require sustaining movement at a relatively high intensity. Endurance exercises include sprinting, cycling, kickboxing and rowing; these exercises also condition the heart and lungs, but require exerting a significant amount of power at regular intervals. These types of exercises can help to increase endurance in a very short period of time, and may also complement a standard weight training routine.

Bodybuilders find it hard to improve their flexibility since most solely focus on lifting. Activities that improve flexibility require one to stretch large and small muscle groups in short intervals. Extending the core muscle groups to their full range of motion is the goal of all flexibility training. An improvement in flexibility can help any body builder develop strength over time because less energy is wasted during a workout due to smooth muscle movements.

Coordination is another fitness area bodybuilders find hard to develop. Again, the primary focus of most bodybuilders is to lift weights and so they develop coordination abilities exclusively for lifting. Most bodybuilders find it hard to demonstrate good coordination on other activities such as simple aerobic and dance routines. Coordination helps in enhancing muscle strength, agility and flexibility. Athletes with good coordination can easily perform different activities and achieve their fitness goals faster.

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