Functional overreaching: the key to peak performance during the taper?
In 33 trained male triathletes, the overloaded athletes who stayed only acutely fatigued gained more over a 4-week taper than those who became functionally overreached, and more than controls; the overreached group also had the highest infection prevalence
Does performance supercompensation during a taper depend on having been functionally overreached by the overload that preceded it? Over 8 weeks, trained male triathletes did 1 week of moderate training, then 3 weeks of overload (or normal training for controls), then a 4-week taper. Abstract only was read.
Participants
n = 33 trained male triathletes: overload training (OT) n = 23, normal training control (CTL) n = 10. After the overload, 11 of the 23 OT subjects were diagnosed as functionally overreached (F-OR) and 12 as acutely fatigued (AF).
Protocol
8 weeks: 1 week of moderate training, a 3-week period of overload training (OT group) or normal training (CTL), then a 4-week taper.
Measured: cycling performance and maximal oxygen uptake (VO2max), after the moderate week, after the overload, and then each week during the taper. The abstract does not describe the cycling performance test.
F-OR defined as decreased performance with concomitant high perceived fatigue after the overload; AF = no decrease in performance.
Analysis: qualitative (magnitude-based) statistics.
Key Findings
11 of the 23 OT subjects were F-OR after the overload period; the other 12 were only AF (no decrease in performance).
Compared with F-OR (2.6% ± 1.1%) and with CTL (2.6% ± 1.6%), the AF group's peak supercompensation in performance was greater, by a small to large margin.
Only the CTL and AF groups had a significant VO2max rise from baseline at the point of peak performance.
Of the peak performances, 60%, 83% and 73% occurred within the first two weeks of taper in CTL, AF and OR, respectively.
Over the study, ten infections were reported; they were more prevalent in F-OR (70%) than in AF (20%) or CTL (10%).
Authors' conclusions: (1) prescribing a heavier load before the taper can bring bigger gains in performance and VO2max, but not when F-OR is present; (2) finishing heavy loads right before the taper does not push peak performance later; (3) F-OR raises the risk of training maladaptation, infection risk included.
Practical Application
**Do I need to be overreached before a taper to peak?In 33 trained male triathletes (23 overloaded for 3 weeks, 10 controls), the 12 overloaded athletes who stayed only acutely fatigued — tired but with no performance drop — had a small to large greater peak supercompensation over a 4-week taper than both the 11 who became functionally overreached and the controls; only the acutely fatigued and control groups raised VO2max significantly.** Load hard before a taper, but treat a performance drop with high fatigue as overshooting, not as the goal.
Most peaks came within the first two weeks of the taper in every group (60%, 83%, 73%), so a heavy block immediately before the taper did not delay the peak in this study.
The functionally overreached group carried the highest infection prevalence (70% vs 20% AF and 10% CTL; ten cases in total) — the abstract's percentages appear to be shares of the ten cases rather than per-group incidence, so quote the direction, not a risk figure.
Limitations
Male triathletes only; n = 33, and the result that matters rests on a post hoc split of the overload group into 11 F-OR and 12 AF, not on randomised arms — athletes who overreach may differ from those who do not in ways that also affect their taper response.
Allocation to OT or CTL is described as "assigned"; randomisation is not stated in the abstract.
Magnitude-based ("qualitative") statistics; the abstract's 2.6% figures are given beside the AF-vs-F-OR and AF-vs-CTL comparisons without naming the statistic.
The cycling performance test and the overload content are not described in the abstract.
Abstract only was read.