Table 1.

Study criteria for inclusion in the review

Participants	Adult male and female athletes (>18 to <45 years), with a minimum of two training sessions per week or at least active college or comparable athlete, without acute (<6 weeks) or chronic (>6 weeks) injury to the lower extremity. Participants did not receive surgery of the lower extremity joints because of a rupture or fracture.
Intervention	Training programmes or interventions which aimed to improve the jump landing strategy or injury risk and thus the biomechanical risk factors for a single or double leg jump landing injury. Interventions must be integrable into amateur sports setting, that is, no need for specialised staff such as an educated programme controller (ie, athletic trainer) or physiotherapist to implement the programme.
Control group	If there is a control group, it should receive a sham treatment or no intervention.
Outcome	Measurement of lower extremity injury rate, either laboratory based, for example, 3D-motion analysis and force plate data, or by means of in-field measures, for example, valid scoring system and expert ratings like the Landing Error Scoring System, while examining single and double leg landings. The biomechanical risk factors consist of increased knee valgus, smaller hip flexion angle, reduced knee flexion angle/moment, or increased GRF especially of the knee.
Study type	Prospective/retrospective or observational (non-)randomised controlled intervention trials.

3D, three dimensional; GRF, ground reaction force.