| P – Patient collective |
The majority of the probands must be women in employment aged 18–65 years. Studies with pregnant women, minors, and tertiary prevention collectives will be excluded. If two or more publications with relevant methods deal with the same population, only the first publication will be considered |
| I – Intervention |
The intervention must comprise defined strength training. Body strength must be measured as maximal voluntary isometric contraction or one-repetition maximum (1-RM). 1-RM describes the maximal weight that can be lifted or moved only once. |
| C – Control interven‧tion |
Control groups without training intervention or with alternative training methods will be considered. |
| O – Outcome |
The outcome must comprise information on muscle strength and the subjective or objective influence of muscle strength or strength training on health. Outcome evaluation must be sex specific. |
| S – Study design |
Randomized controlled studies published in English or German before March 2016 will be included. No other study designs will be considered. |
