NFL Combine Training: Improve Your 40-Yard Dash & Vertical

Between 2010 and 2022, the NFL draft position of skill-position players correlated with 40-yard dash time at r = −0.51 for wide receivers and r = −0.47 for running backs — stronger than any other single combine metric (Sierer et al., 2008, replicated in updated datasets). A 0.05-second improvement in 40-yard dash time — the margin separating a 4.40 from a 4.45 — shifts a receiver's draft-round projection by approximately half a round. This guide deconstructs each combine event, provides the physiological mechanisms and measurable benchmarks, and presents an 8-week peaking programme designed to express peak power output on test day rather than simply accumulate fitness.

The NFL Scouting Combine evaluates six athleticism events that are weighted differently by position and team analytical models. Understanding which events matter most for each position prevents training resources from being misallocated in the final 8–12 weeks before the combine.

Most skill position prospects benefit from allocating 50–60% of training time to 40-yard dash and vertical jump preparation, and 25–30% to 3-cone and shuttle. Only offensive and defensive linemen should prioritise the bench press test above sprint and jump events.

The 40-yard dash consists of two mechanistically distinct phases: acceleration (0–20 yards, ~2.5–2.8 s for elite athletes) and maximum velocity maintenance (20–40 yards, ~1.5–1.8 s). Performance can be limited in either phase, and the training response differs substantially depending on where the time is being lost.

Acceleration phase (0–20 yards) is driven by horizontal force production and step frequency. The key mechanical variable is the ratio of horizontal to total ground reaction force — Morin et al. (2012) demonstrated that this ratio (termed Rf) explains 69% of 10-meter sprint time variance in elite sprinters, more than any single strength metric. Athletes with high vertical jump but slow 40-yard dash times almost always show a deficit in horizontal force orientation — they push down rather than back.

Training targets for the acceleration phase:

• Sled push: 10% body weight load, 20-yard accelerations, 6 reps, 3-minute rest. This specific overload increases horizontal force orientation without disrupting sprint mechanics.
• Hip-dominant RDL deadlift: 1.5–2.0 × bodyweight. Posterior chain strength is the primary generator of horizontal propulsive force at the first 3–4 steps.
• Single-leg bounds: 3 × 5 contacts each leg, emphasis on low ground contact time. Improve reactive force at typical acceleration contact times (120–160 ms).

Maximum velocity phase (20–40 yards) depends on stride length, stride frequency, and the ability to maintain horizontal force at higher movement velocities. Flying 20s (accelerate over 20 yards, time the final 20) isolate this phase and should be included in the testing battery.

The combine vertical jump is performed from a standing position with the arm swing freely allowed. This differs from the research standard (hands on hips) and adds 4–7 cm to jump height compared to a controlled CMJ protocol. At the 2023 NFL combine, the mean vertical jump for wide receivers was 38.2 inches (97 cm), for cornerbacks 39.1 inches, and for offensive linemen 28.5 inches — data reflecting both athletic selection and training specificity.

Vertical jump improvement requires a different stimulus than 40-yard dash improvement. The CMJ is primarily limited by the eccentric-concentric transition speed and peak power output during the concentric phase. Research by Cormie et al. (2010) in athletes with a training history comparable to combine prospects showed that 6 weeks of heavy strength training produced 11.5% vertical jump improvement, while 6 weeks of ballistic training produced 8.4% improvement — but the combination in a concurrent protocol produced 17.3%, the largest gain. This establishes the primary prescription: concurrent heavy strength (trap bar deadlift >2× BW at 80–85% 1RM) and ballistic work (trap bar jump squat at 30% 1RM, maximal velocity intent) performed in the same session in that order.

Broad jump performance correlates most strongly with horizontal power output and reactive strength index (RSI). Athletes who exceed 120 inches in the broad jump typically show RSI values above 2.5 (CMJ height in m / time to take-off in s), indicating superior stretch-shortening cycle utilisation. Training the broad jump specifically requires adding horizontal-component jumps: approach broad jumps from a 3-step run, bounding sequences, and box jump to broad jump complexes.

The 3-cone drill (L-drill) requires covering an L-shaped course of 10 yards × 10 yards with two 90° direction changes and one 180° turn. The limiting factor is not top speed but entry velocity into each turn and the ability to decelerate-reaccelerate in the shortest possible distance. Research from Young et al. (2015) found that eccentric quadriceps strength at high velocities (measured isokinetically at 180°/s) was the strongest predictor of 3-cone drill performance, explaining 42% of variance — outperforming sprint time as a predictor.

Key training interventions for 3-cone improvement:

• Lateral shuffle bounds: developing lateral deceleration capacity at approach velocities
• Single-leg squat landing at 45° approach angle: trains the force absorption pattern specific to the cone pivot
• Nordic hamstring curl negatives: strengthens the hamstring in the lengthened position, preventing the pull injury that frequently occurs at the 180° turn
• COD drills with sprint timing gates: use reactive signals (visual or auditory) to train decision-making speed alongside mechanical efficiency

The short shuttle (5-10-5) requires maximal acceleration from standing, deceleration, reverse acceleration, and two 180° pivots within 20 total yards. Ground contact time at the pivot is typically 200–280 ms — exactly the reactive strength window that RSI training optimises. Athletes with RSI above 2.8 consistently produce short shuttle times below 4.15 seconds.

Combine preparation fails when athletes jump directly to speed-specific work without meeting minimum strength thresholds. The following minimum standards should be achieved before the final 8-week peaking phase begins. Below these thresholds, 4–6 weeks of strength accumulation will produce more performance gains than event-specific training:

• Trap bar deadlift: 2.0 × bodyweight for skill positions; 1.8 × BW minimum
• Hex bar jump squat: at least 0.90 m/s mean velocity at 30% 1RM (indicates adequate power expression capacity)
• Single-leg squat: 10 reps at bodyweight without lateral trunk deviation or knee valgus collapse
• Nordic hamstring curl: eccentric completion through full range without hip collapse

The neurological readiness metric matters too: if CMJ height measured on a fresh morning is below 75% of the population norm for the athlete's position, absolute strength is the limiting factor regardless of what training history suggests.

The 8-week protocol is organised as two 4-week mesocycles: accumulation (Weeks 1–4) and peaking (Weeks 5–8). Each week includes 3 speed/power days and 2 strength days.

Weeks 1–4: Power Accumulation

• Speed day A: 6 × 10-yard sled accelerations (10% BW) + 4 × 20-yard flying sprints, full recovery between runs
• Speed day B: 3 × 3-cone drill + 3 × short shuttle at 85% effort (technical focus)
• Speed day C: trap bar jump squat 5 × 4 at 30% 1RM, maximal intent; CMJ 3 × 3
• Strength day: trap bar deadlift 4 × 4 at 80% 1RM; Nordic curl 3 × 5; Copenhagen adductor holds 3 × 20 s

Weeks 5–8: Peaking and Expression

• Volume reduces by 30–40%; intensity and quality maintained
• Sprint sessions: 4 × 40-yard full efforts at 95–100% with 8-minute rest between trials
• Jump sessions: vertical jump 3 × 3 maximal; broad jump 3 × 3 maximal; 6-minute rest
• Agility: 2 × 3-cone and 2 × short shuttle at 100% effort; 5-minute rest
• Strength days: reduce to 3 × 3 at 80–85% 1RM; no additional accessory volume

The final 5 days before combine testing: no strength training, two short acceleration sessions (6 × 20 yards at 90%), emphasis on sleep (8–9 hours), hydration, and carbohydrate intake. The last 48 hours before testing should be complete rest.

Velocity monitoring during the peaking phase provides the earliest signal that an athlete has reached peak neuromuscular readiness — typically 5–7 days before they subjectively feel ready. The key indicator is the velocity of a jump squat or trap bar pull at a fixed submaximal load. When this velocity exceeds the profiled value by 3–5%, the athlete is in an elevated performance state and is ready for maximal testing.

In practice, perform a morning readiness check 3× per week during Weeks 6–8: 3 CMJ reps and 3 trap bar jump squats at 20% 1RM. Log mean velocity. If both are trending upward over 3–5 consecutive sessions, the taper is working. If both are flat or declining, the training load is still too high and volume needs to be reduced further. Most athletes in a proper combine taper will see their daily CMJ peak 4–6 days before the combine and then stabilise — this is the window for performance testing.

1. Training only from a standing start instead of the combine stance. The NFL combine 40-yard dash starts from a 3-point stance with one hand on the ground. This position changes hip angle, forward lean, and initial foot contact position compared to a standing sprint start. Athletes who train exclusively with a standing start lose 0.04–0.07 seconds at the starting position through unfamiliarity. The solution: 30–40% of acceleration sessions should use the combine-specific starting position from Week 3 onward.

2. Tapering strength too aggressively. Removing strength training entirely 3 weeks before the combine eliminates the neural stimulus that maintains peak force output. Research shows that reducing to 1 strength session per week with 3 × 3 at 80–85% 1RM maintains peak power for up to 28 days — without fatigue accumulation. Athletes who train no heavy sets in the final 3 weeks typically produce 3–5% lower peak power on test day compared to the tapered group.

3. Ignoring the thermal warm-up for testing day. A 15-minute progressive warm-up that includes acceleration ramp-ups increases muscle temperature to the optimal range for contractile speed (38–40°C) and can add 0.02–0.04 seconds to 40-yard dash performance compared to a 5-minute warm-up. At the combine, the warm-up window before your event is fixed — know your routine and execute it precisely within the available time.