Resistance Training for Muscle Growth

(SLML Trial)

This trial explores whether applying peak force at different muscle lengths during resistance training enhances muscle growth and strength. Participants will test two workout types: one applying force when the muscle is more stretched (LONG resistance training) and the other when it's more contracted (SHORT resistance training). The study seeks young adults who have not engaged in regular resistance training in the past year. Participants will work out twice a week for 12 weeks, with strength and muscle size measured at the beginning and end. As an unphased study, this trial offers a unique opportunity to contribute to the scientific understanding of muscle growth and strength.

The trial requires that you stop taking any drugs that alter skeletal muscle metabolism, such as Metformin or Benzodiazepines, and avoid Omega-3 supplements like fish oil for at least 6 weeks before participating.

Research has shown that resistance training is generally safe and can increase muscle size and strength. Studies have found that regular resistance training leads to muscle growth and improved physical function. Those who engage in resistance training regularly tend to have more muscle mass and strength compared to non-exercisers.

Additionally, resistance training is safe for young people, including children and teenagers, when performed with proper techniques. Therefore, the training methods used in this trial (LONG and SHORT resistance training) are likely to be well-tolerated by participants.

Researchers are excited about the LONG and SHORT resistance training protocols because they offer a fresh approach to building muscle by tailoring exercise duration and intensity. Unlike traditional strength training methods that typically focus on uniform workout routines for all muscle groups, these protocols use a unique within-subject design to customize training based on individual muscle responses. This could potentially enhance muscle growth and strength more effectively by optimizing the workout for each limb. By comparing different timeframes and intensities, this trial aims to uncover the most efficient way to achieve muscle growth, possibly transforming how we approach resistance training.

Research has shown that resistance exercises with more stretched muscles (LML-RT) might lead to bigger and stronger muscles compared to less stretched muscles (SML-RT). Studies have found that lifting heavy weights effectively increases muscle strength, with a 98.2% chance of better results. In this trial, participants will engage in both LONG and SHORT resistance training sessions. Using a full range of motion, similar to the LONG condition, can improve muscle size, strength, speed, and power. Both LONG and SHORT resistance training can enhance muscle strength and size, but the LONG condition is expected to yield better results. These findings suggest that applying maximum force when muscles are more stretched during training could be more effective for muscle growth and strength gains.⁶⁷⁸⁹¹⁰