Muscular endurance can only be improved through strength and endurance programs complemented with a sound nutrition plan. You need to add strength and cardiovascular workouts into your routine consistently for several weeks to increase muscle size and mass. The best way to increase strength quickly is to mix different sports into your training routine. Focus on improving your form on each sport and you can expect muscle gains quickly while maintaining a high level of motivation due to the variety of your activities.

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.

Building up agility will help improve the overall motion range of core muscle groups and joints. An increase in agility will help a bodybuilder do cardiovascular exercises aimed at building endurance. Some sports that increase agility are basketball, football, soccer, gymnastics and figure skating. These sports involve irregular bursts of movements that require a combination of strength, speed and flexibility. These types of movements challenge the body and enhance heart and lung functions.

Endurance is increased through activities that require sustained high intensity movements. Endurance increasing activities include sprinting, cycling, rowing and boxing. These activities also improves heart and lung functions; the only difference is that these activities are performed with regular bursts of strength. You can do these activities exclusively or use them to complement your normal weight-training program.

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.

Improving coordination can be an ongoing process, and is another element of fitness that may be difficult for the average bodybuilder. While most bodybuilders have ample coordination abilities for lifting weights, they may not be as well-coordinated performing stepping routines in an aerobic workout setting or executing simple dance sequences. Improving coordination also helps with muscle flexibility, strength and agility, and taking part in activities that improve coordination can help bodybuilders incorporate a wide range of activities into their workout routine and achieve their fitness goals with ease.

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