30-Second Takeaway
- Use HR-based TRIMP to guide endurance load in team sport athletes; sRPE is less tightly linked to adaptation.
- Post-ACLR, coordination variability and quadriceps power deficits should influence RTS testing and late-phase rehab.
- Elite para-footballers warrant ECG-inclusive cardiac screening due to higher rates of significant cardiac pathology.
Week ending December 13, 2025
Load monitoring, ACL rehab and RTP, para-athlete cardiac screening, and targeted ergogenic aids
HR-based TRIMP best predicts endurance adaptations in team sport athletes
This systematic review and meta-analysis included 40 studies with 726 team sport players followed over at least two weeks of training. Higher HR-based TRIMP showed moderate-to-strong correlations with improvements in VO₂max and lactate thresholds (r ≈ 0.43–0.63). Session-RPE correlated only weakly with changes in velocity at 2 mmol·L⁻¹ lactate, and external load measures had limited associations. These findings support prioritizing HR-derived TRIMP to monitor internal load and anticipate endurance adaptations in team sports.
Landing coordination variability after ACLR and risk of second ACL injury
This secondary analysis followed young athletes for two years after RTS following primary ACL reconstruction. Single-leg landing kinematics at RTS were used to compute joint coordination variability via a modified vector coding approach. Controls showed lower coordination variability on both limbs, whereas athletes who later sustained a second ACL injury had the highest variability on the involved limb. Higher variability suggests less consistent landing strategies and may represent a targetable neuromuscular risk factor in RTS assessment and rehabilitation.
RTP and graft failure after ACLR in professional soccer remain high despite slower RTP
This meta-analysis pooled 20 studies including 1,988 professional soccer players after ACL reconstruction. Overall, 92.3% returned to play and about 80% regained their pre-injury performance level. Mean time to RTP increased from 203.5 days in 2011–2016 to 295.1 days in 2022–2025, a >40% delay. Despite slower RTP, the pooled graft re-rupture rate remained 8.2% with no significant difference between eras. Slower, likely criteria-based RTP has not yet translated into lower graft failure rates in this population.
Elite para-footballers show markedly higher rates of clinically important cardiac disease
This cohort study evaluated 156 elite para-football players with questionnaire, ECG, and echocardiography, comparing findings with 1,000 matched non-para footballers. Para athletes reported more cardiac symptoms and required more follow-up than non-para peers (14.7% vs 6.6%). Cardiac pathology needing management or surveillance was diagnosed in 6.4% of para players versus 2.1% of non-para players, including more SCD-associated conditions. Short PR intervals were more frequent in para athletes, while T-wave inversion and QTc abnormalities were similar between groups. No sudden cardiac deaths occurred over roughly five years, but findings support ECG-inclusive screening and surveillance in para-footballers.
References
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Additional Reads
Optional additional studies from this edition.