Table 3

Reported compliance, adverse events, individual study estimates and precision of included studies

StudyReported complianceReported adverse events (number of events)ITT individual study estimates
RR (95% CI)
Precision (CLR)Per protocol individual study estimates RR (95% CI)Precision (CLR)
Askling et al19100%DOMS (n=11 athletes)0.30 (0.10 to 0.88)8.8NANA
Gabbe et al20Intervention group: 50% decline in participation rate from session 1 to session 2
Control group: 10% decline in participation rate from session 1 to session 2
<10% of athletes participated in season session 2
30% of consenting athletes (n=66) failed to complete one session, while 103 (46.8%) completed at least two sessions
DOMS was primary reason reported for lack of compliance (n=NR)1.15 (0.48 to 2.83)5.90.30 (0.08 to 1.12)14.0
Engebretsen et al21Only 21.1% (12 athletes) completed 20 or more training sessions
63.2% of players reported not having performed any exercises, 7.9% of athletes performed 1–9 sessions and 7.9% of athletes performed 10–19 sessions
DOMS (n=NR)2.71 (0.35 to 20.79)59.40.94 (0.29 to 3.07)10.6
Petersen et al22Team compliance was an average of 91% of the intended training sessions performed during the 10-week midseason period (8% dropout rate in intervention group and 9% dropout rate in control group)
Compliance was not measured after the first 10 weeks
DOMS (n=“most players in the intervention group”)0.30 (0.17 to 0.53)3.1NANA
  • CLR, confidence limit ratio; DOMS, delayed onset muscle soreness; NA, not applicable; NR, not reported; RR, risk or rate ratio.