Periodising a Decathlete's Final Six Weeks
A 19-year-old decathlete has personal bests of 11.1 s (100 m), 7.10 m (long jump), 12.5 m (shot put), 1.95 m (high jump), 50.5 s (400 m), 15.2 s (110 m hurdles), 38.0 m (discus), 4.40 m (pole vault), 55.0 m (javelin) and 4:40 (1500 m). He competes in six weeks. His coach wants a three-week hypertrophy/strength block followed by a three-week power/competition block. He has a chronic right hamstring strain that flares when weekly high-speed running exceeds 1800 m, and a left shoulder impingement aggravated by overhead pressing and by pole vault plant mechanics. He currently trains five days per week with two throwing sessions and two jumping sessions.
1. Identify the two most significant programming constraints and justify each with reference to the athlete's event profile and injury history.
Read the worked answer
Constraint 1: high-speed running volume ceiling. The hamstring is the limiter in the 100 m, 110 m hurdles, long jump and 400 m, so speed exposure cannot simply be cut. The athlete's tolerance is 1800 m per week, meaning the coach must budget rather than eliminate sprint metres. Acceleration work and hurdle rhythm drills count toward the budget, so a week containing a 400 m race-pace session plus a hurdle session plus long-jump approaches will exceed the ceiling unless one is reduced. This is a volume-distribution problem, not an avoidance problem.
Constraint 2: overhead loading conflict. The shoulder impingement is provoked by overhead pressing and by the pole vault plant. Hypertrophy blocks commonly include overhead pressing, so this exercise choice must be substituted (e.g. neutral-grip rowing, landmine press) rather than the whole upper-body session being dropped, because throwing and vaulting both need shoulder girdle strength. Pole vault technique work should be scheduled away from heavy throwing days to avoid stacking shoulder stress.
2. Explain how the three-week hypertrophy/strength block should be modified given that the athlete must peak in six weeks.
Read the worked answer
A conventional hypertrophy block uses high volume and moderate load with substantial soreness, which is inappropriate this close to competition. The block should be shortened in effective duration by front-loading volume in week one and tapering volume across weeks two and three while maintaining intensity. Hypertrophy should be treated as a residual-quality target: enough stimulus to maintain cross-sectional area and tendon health, not maximal growth. Concretely, accessory work at 3 x 8-10 with moderate loads, compound lifts kept at higher intensity and lower volume, and sprint/jump work maintained at low volume to preserve coordination. The final week of the block should already reduce lower-body volume so the power block starts from a recovered state rather than a fatigued one.
3. The athlete's 1500 m is comparatively weak. Evaluate whether improving it should be a priority in this six-week window.
Read the worked answer
No. The 1500 m is the final event and is worth relatively few points; gains there require aerobic development that takes longer than six weeks and would add running volume that competes with the hamstring budget. The marginal point return per training hour is far higher in the throws (shot put and discus at 12.5 m and 38.0 m are well below the athlete's other standards) and in the pole vault, where technical improvement can yield large point jumps. The 1500 m should be maintained with one tempo session per week rather than developed. This is a resource-allocation judgement: the coach should compare estimated point gain per session across events, not simply target the weakest event.