# Quality controls

## TL;DR

This study found that a steroid drug improved endurance in healthy men, as measured by the number of weight lifts.

## Contribution

The study demonstrates a dose-dependent improvement in endurance from a steroid drug in healthy subjects.

## Key findings

- The number of weight lifts increased with higher doses of the steroid drug.
- Endurance was enhanced in the steroid-injected arm compared to the control arm.

## Abstract

Some steroid drugs are designed for clinical use to combat muscle-wasting diseases, but are also used by athletes to improve their performance by increasing muscle strength or endurance. This study investigated the effect of one steroid drug on the number of times a weight could be lifted by healthy male subjects as a measure of endurance. The ratio of number of lifts performed with a steroid-injected arm versus a sham-injected control arm increased with the drug dose; the authors therefore concluded that the drug improved endurance.