Academy Blog

Core training has maintained its popularity in fitness and rehabilitation despite controversies over optimal training methods for “core stability.” Training with unstable surfaces such as Thera-Band® exercise balls, stability trainers, and balance boards have been recommended for core training, suggesting that such surfaces promote activation of core muscles. The “core” can be defined as the axial skeletal and its muscular and fascial attachments, including the pelvic and shoulder girdle.

Recently, resistance training while balancing on unstable surfaces such as exercise balls has become popular. Canadian researchers David Behm PhD and colleagues published a comprehensive review and position stand on the use of instability to train the core. Research has shown that exercises performed on unstable surfaces produce higher levels of muscle activation in both the core and extremity muscles compared to stable surfaces. However, force and power outputs are decreased while exercising on unstable surfaces, sometimes up to 70%. Interestingly, increasing levels of core muscle activation can also be achieved with free weight exercises such as squats and Olympic lifts without added instability.

In their article, the authors made several recommendations for both athletes and non-athletic conditioning based on their review of the literature. Dr. Behm et al. noted that athletes should emphasize “higher-intensity ground-based lifts” (such More >