To support muscle strength in the middle back through supplements, you might consider the following:

1. Branched-Chain Amino Acids (BCAAs): These include leucine, isoleucine, and valine, which may help in increasing muscle size and strength when coupled with a weight-training program. However, a diet with adequate high-quality protein might provide similar benefits as BCAA supplements¹.

2. Beta-Alanine: This amino acid is used by the body to produce carnosine, which helps reduce the buildup of lactic acid during exercise. It might offer some performance improvements in activities that require high-intensity, intermittent effort, although evidence is mixed¹.

3. Beta-hydroxy-beta-methylbutyrate (HMB): HMB is a compound derived from leucine that might help in muscle recovery after exercise-induced damage. Its effects on general muscle-building and strength are less clear, but some evidence points to benefits in recovery and reducing muscle-protein breakdown¹.

4. Creatine: Although not covered directly in the search results, creatine is widely known for helping increase muscle mass and improving performance in high-intensity exercises. It is often used by athletes to support muscle strength and growth.

These supplements have varying levels of evidence supporting their use, so it's important to consult with a healthcare provider before starting any new supplement regimen, especially if you have any underlying health conditions or are taking other medications.

Would you like me to search for specific products containing any of these supplements?

Footnotes

1. Office of Dietary Supplements, 2021 ↩ ↩² ↩³