High Jump Training: Approach, Takeoff & Bar Clearance

Dick Fosbury cleared 2.24 m at the 1968 Mexico City Olympics using a back-layout style the athletics world had never seen at competition level — and within a decade, his technique had replaced all others. Today, the Fosbury Flop accounts for virtually every elite high jump clearance, and the world record stands at 2.45 m (Javier Sotomayor, 1993). But mastering high jump is not simply learning a new bar-clearance shape. Research by Dapena et al. (1990, 2000) established that approach speed and penultimate step mechanics account for 70–80% of the takeoff velocity that determines bar clearance height — making the run-up at least as important as the technique over the bar. This guide covers the biomechanics and training protocols that develop all three phases: approach, takeoff, and clearance.

The Fosbury Flop's biomechanical advantage over earlier straddle techniques lies in its ability to raise the athlete's centre of mass (CoM) above the bar while keeping the CoM path below the bar. This exploits the non-rigid nature of the human body: by arching the back and dropping the head and legs sequentially as each body segment clears, a skilled jumper can clear a bar set above their CoM at takeoff.

Dapena (1980) calculated that an athlete can theoretically clear a bar approximately 20–25 cm above their CoM height at takeoff using an optimal Flop technique — versus 10–15 cm advantage for the best straddle technique. This architectural difference is why even a technically imperfect Flop outperforms a well-executed straddle at elite heights.

The CoM height at takeoff is the fundamental performance determinant. It depends on: standing height, arm span, and lower-limb length (fixed), plus the degree of forward trunk lean eliminated during the penultimate step (trainable). Athletes who carry excessive forward lean into takeoff lower their effective CoM and waste 5–15 cm of potential clearance height regardless of how well they arch over the bar.

The curved approach run — typically 8–10 strides forming a J shape — serves a dual purpose: building horizontal velocity and generating centripetal force that contributes to takeoff vertical velocity. As the jumper curves, they naturally lean inward (toward the bar), lowering their CoM relative to the straight-run position. During the final strides, rapid straightening of this lean converts horizontal and centripetal momentum into vertical impulse at takeoff.

Research by Greig & Yeadon (2000) showed that elite high jumpers reach approach speeds of 7.0–8.5 m/s at the final stride, with world-class male jumpers achieving 8.0–9.0 m/s. The radius of the curved section averages 8–12 metres; tighter radii generate more lean angle but require greater lateral leg strength to maintain.

Approach Checkpoints by Stride Phase

• Strides 1–4 (straight run-up): Relaxed acceleration. Foot contacts behind hip, progressive frequency increase. Target: reach 70–75% of top approach speed by Stride 4.
• Strides 5–7 (curve entry): Begin the arc. Inside arm drops naturally as lean angle builds. Stride length increases slightly; frequency maintains. Body angle 15–25° from vertical at Stride 7.
• Final 3 strides (penultimate acceleration): Approach speed peaks in the penultimate step (second-to-last). Frequency drops and ground contact lengthens as the athlete loads the takeoff leg. This controlled deceleration converts horizontal velocity into vertical without technical breakdown.

The penultimate step (second-to-last stride) is the most biomechanically critical moment in the high jump. Dapena et al. (1990) identified three simultaneous tasks the athlete must execute in approximately 150 ms: lower the CoM (by increasing knee flexion to 60–80° versus the preceding strides), increase stride length (to create the foot-strike position that loads the takeoff spring), and maintain approach speed without braking.

Takeoff duration averages 170–200 ms in elite jumpers. During this time, the ground reaction force peaks at 5–8× body mass vertically. The key mechanical variable is not peak GRF but impulse direction: jumpers with a more vertical GRF direction at takeoff achieve greater CoM height gain per unit of approach speed. This explains why a technically refined jumper clearing 2.10 m may have lower absolute approach speed than a power-dominant jumper clearing 1.95 m.

Once airborne, the high jumper cannot change the height of the CoM trajectory — that is determined entirely by the takeoff. Bar clearance technique only affects how the body segments distribute around that fixed CoM path. The Flop sequence is: (1) head back as shoulders clear the bar, (2) thoracic spine hyper-extension peaks as the hips approach the bar, (3) simultaneous hip drive (lifting hips over bar) and knee flexion, (4) leg kick (rapid knee extension to lift heels as hips clear).

Common errors at bar clearance and their mechanical cause:

• Hip contact with bar: Insufficient hip drive or peak arch occurring too early. Fix: pause drills at 1.5 m below competition height focusing on hip timing against the bar.
• Head too forward: Premature visual checking of bar position reduces thoracic extension. Fix: eyes to sky at takeoff, not bar-checking until descent.
• Leg drop before hip clear: Premature leg kick creates a lever that depresses the hips into the bar. Fix: hip must reach highest point before knee extension begins.

Physical preparation for high jump targets five qualities: sprint acceleration (for approach speed), reactive strength (for takeoff stiffness), single-leg vertical power (for takeoff impulse), hip flexor explosiveness (for free-leg drive), and lumbar-thoracic extension (for bar clearance arch). The following 12-week structure integrates these:

Weeks 1–4: Strength Foundation

• Barbell back squat: 4 × 4 at 80–85% 1RM. Builds the force base for takeoff leg.
• Single-leg Romanian deadlift: 3 × 6 each side. Posterior chain unilateral strength mimics single-leg landing and takeoff demand.
• Hurdle mobility circuit: 10 × each leg, high-knee passes over 91 cm hurdles. Hip flexor and hip rotator mobility essential for Flop clearance.

Weeks 5–8: Power Conversion

• Depth jump from 45–60 cm box: 4 × 5. Reactive strength index (RSI) target >2.5. Short contact time (<200 ms) with maximum jump height.
• Bounding: 4 × 40 m. Horizontal elastic power that transfers to approach acceleration.
• Single-leg box jump to height: 4 × 4 each leg. Specific to takeoff limb explosive demand.

Weeks 9–12: Specific Integration

• Harness-assisted approach sprint: 4 × 30 m at 105–110% maximum velocity. Overspeed training for approach speed ceiling.
• Curved approach with pop-up (plant and vertical jump without bar): 6 × full approach to takeoff. Integrates approach speed with takeoff mechanics without competition pressure.
• Bar clearance with PVC pipe at reduced height: technique repetitions with full arch and leg kick, prioritising sequencing over height.

High jump is a single-effort maximal power event with long recovery between attempts. Unlike multi-jump events (long jump, triple jump), the high jumper's energy system demand is almost entirely alactic — each attempt lasts under 3 seconds from approach initiation to bar contact. Competition management (up to 15+ attempts at a major championship) creates a fatigue profile where CMJ height progressively decreases across attempts at sub-maximal bar heights as neural fatigue accumulates, then briefly recovers during the 10–15 minute interval before personal-record attempts.

Physical quality benchmarks for elite male high jumpers (Dapena, 2000; Aragon-Vargas & Gross, 1997):

• CMJ height: >55 cm (elite), 45–55 cm (national), <45 cm (club)
• Squat 1RM: 1.8–2.2× body mass
• Depth jump RSI: >2.5 (elite), 1.8–2.5 (national), <1.8 (club)
• Sprint 30m: <3.8 seconds (elite male)

High jump has a defined outdoor competition season (April–September in the northern hemisphere) with an indoor season (January–March). The annual plan typically divides into: general preparation (October–November), specific preparation (December–January), indoor competition (February–March), outdoor preparation (April), and outdoor competition (May–September).

Volume and intensity periodisation: general preparation emphasises high resistance training volume and moderate intensity (70–80% 1RM, 4–5 sessions/week). Plyometric volume is moderate (60–80 total foot contacts/session). As the competition season approaches, resistance training volume drops 40–50%, intensity increases to 85–90% 1RM in fewer sets, and approach-run repetitions replace general plyometric volume. During competition weeks, resistance training is limited to one session at 85% 1RM × 3 sets × 3 reps — sufficient to maintain neural drive without accumulating muscular fatigue.

The two most common high jump injuries are Achilles tendinopathy (takeoff leg) and patellar tendinopathy (takeoff leg), both driven by the repetitive high-load eccentric demand of depth jumping and bounding during preparation phases. A third significant injury pattern is lateral ankle sprain of the takeoff ankle during curved approach practice, particularly on wet runways.

Prevention priorities: (1) Progressive plyometric volume — do not exceed 100 high-intensity foot contacts per session during preparation phases. (2) Eccentric Achilles loading: seated calf raise with 3-second lowering phase, 3 × 12, twice weekly year-round. (3) Monitor approach-run technique on wet surfaces — reduce approach speed to 85–90% on wet runways and avoid bounding on slick surfaces. (4) Annual MRI or ultrasound of patellar and Achilles tendons at the transition to high-competition phase to catch sub-clinical tendinopathy before it becomes symptomatic.

Based on the biomechanical research and practical coaching experience, three priorities reliably separate improving high jumpers from those who plateau:

1. Approach speed is the ceiling — raise it first: Most club-level high jumpers have adequate technique but insufficient approach speed. Adding 0.5 m/s to approach speed translates to approximately 4–6 cm of additional CoM height at takeoff, more than most technique corrections achieve. Prioritise sprint training and harness-assisted approach work before refining bar clearance mechanics.
2. Monitor takeoff contact time weekly: Takeoff contact time is a sensitive indicator of both technique quality and neuromuscular fatigue. A contact time creeping above 200 ms when it was previously 175 ms signals accumulated fatigue — reduce plyometric volume. A contact time stable but jump height decreasing suggests stiffness without spring, requiring elastic ankle loading work.
3. Practise bar clearance independently of the full approach: Athletes who only practise bar clearance during full-approach attempts get too few quality repetitions to develop the hip drive and leg kick timing. Dedicated clearance work from a 3-stride approach at 70% of competition height, 10–15 repetitions per session, accelerates technical learning without full approach fatigue.