4 Sprint Training Drills That Benefit from Accurate Timing

Most speed training programs tell you to "run fast" and rest. But without accurate timing, you have no way to know whether you actually ran faster, whether your rest interval was long enough, or whether you are improving week over week. Subjective effort is unreliable—a sprint that feels fast on tired legs might be slower than an easy rep on fresh ones.

Objective timing data solves three specific problems in sprint training drills:

• 1

  Objective feedback per rep. You know immediately whether a cue change, a drill variation, or a rest adjustment actually produced a faster time.

• 2

  Progress tracking across sessions. Comparing times from Tuesday to Thursday only works when the timing method is consistent. A hand-started stopwatch introduces 0.2–0.4 seconds of variation per run—enough to hide real improvements entirely.

• 3

  Identifying plateaus early. When your times flatten over several sessions, you can adjust your program before wasting weeks on a drill that has stopped producing adaptations.

The five drills below are staples of speed training programs at every level. Each one becomes significantly more useful when you have accurate, automated timing instead of a coach fumbling with a stopwatch button.

What It Is

A flying 30 removes the acceleration phase entirely. You build up speed over 20–30 meters, then sprint at maximum velocity through a timed 30-meter zone. The clock only runs while you are at (or near) top speed.

How to Set It Up

Mark three points: a start cone, a timing-start cone 20–30 meters down the track, and a timing-end cone 30 meters beyond that. Place your phone at the timing-start line pointed across the lane. If you have a second phone, place it at the timing-end line for a two-phone split setup. Sprint from the start cone, hit full speed by the timing-start cone, and maintain through the timing-end cone.

What to Measure

Your flying 30 time is a pure measure of maximum velocity. For elite male sprinters, this is typically 2.8–3.2 seconds. For high school athletes, 3.5–4.2 seconds is a common range. Track this number across weeks to see whether your top speed is actually improving.

Why Accurate Timing Matters Here

Because the acceleration variable has been removed, the differences between good and great reps are small—often 0.05–0.15 seconds. A hand-timed stopwatch cannot distinguish a 3.10 from a 3.20 reliably. With automated timing that has millisecond-level consistency, you can trust that a 0.08-second improvement is real, not noise.

What It Is

This drill isolates the start and initial acceleration phase—the first 20 meters out of blocks (or from a standing/3-point start). It is one of the most technically demanding parts of sprinting: block angles, push-off timing, shin angles, and drive phase mechanics all combine to determine how quickly you cover those first 20 meters.

How to Set It Up

Place one phone at the start line and a second phone at the 20-meter mark. Use TrackSpeed's thumb release start type — the athlete holds their thumb on the start phone's screen while in the blocks, and timing begins the instant they lift off. This gives you a precise reaction time and eliminates the need for a coach to press "go." The two-phone setup then captures the 20-meter split automatically at the finish phone.

What to Measure

The total time from first movement to crossing the 20-meter mark. For competitive sprinters, this is often in the 2.5–3.2 second range. More importantly, track the consistency of this number: a tight cluster of times indicates reliable technique, while a wide spread suggests inconsistency in your start mechanics.

Why Accurate Timing Matters Here

Block start improvements are measured in hundredths of a second. Changing your block spacing by two inches might save 0.03 seconds. Adjusting your first-step angle might cost 0.02 seconds. Without timing that is repeatable to within a few hundredths, you cannot evaluate whether a technical change helped or hurt. Automated detection eliminates the reaction-time variability of a coach pressing a button.

What It Is

In-and-out sprints alternate between acceleration, maintenance, and deceleration zones within a single run. The standard format over 60 meters is: accelerate hard for 20 meters, maintain speed with relaxed form for 20 meters, then decelerate over the final 20 meters. This drill teaches athletes to reach top speed and hold it without tensing up.

How to Set It Up

Mark four cones at 0, 20, 40, and 60 meters. Place your two phones at the transition points where you want split data. For example, place one at the 20-meter mark and one at the 40-meter mark to capture the "maintenance zone" split separately—this is the most valuable data point, as it tells you how well you held speed through the relaxed phase.

What to Measure

The key metric is the split time through the maintenance zone (20–40m). Compare this to your flying 30 time from Drill 1. If the maintenance zone split is significantly slower than your flying time, you are losing speed during the "hold" phase—usually due to tension. A close match means you are maintaining velocity efficiently.

Why Accurate Timing Matters Here

The whole point of this drill is comparing split times across zones. If your timing system has 0.2–0.3 seconds of variability (typical of hand timing), the zone comparisons become meaningless—you cannot tell whether a slower maintenance zone is due to actual speed loss or timing error. Consistent automated timing makes the zone-to-zone comparison reliable.

What It Is

Resisted sprints use a sled, parachute, or resistance band to overload the sprint pattern. The training effect comes from producing more force at high movement speeds. The drill itself is simple: sprint a set distance (typically 20–40 meters) with resistance, then sprint the same distance without resistance. Comparing the two times quantifies the resistance effect.

How to Set It Up

Pick a distance—30 meters works well for most athletes. Place your phone at the finish line. Run three reps with resistance and three reps without, using the same start protocol each time. A two-phone setup with phones at 0 and 30 meters ensures the start detection is consistent between resisted and free sprints.

What to Measure

Track two numbers: your resisted time and your free time over the same distance. The difference tells you the speed cost of the resistance. Research suggests that resistance should slow you by no more than 10% of your free sprint time to maintain sprint-specific mechanics. If a sled slows you by 15–20%, the load is too heavy for speed development (though it may still have value for strength work).

Why Accurate Timing Matters Here

The 10% threshold depends on the timing being reliable. If your free sprint over 30 meters is 4.20 seconds, a 10% load should produce roughly 4.62 seconds. If your timing system has 0.3 seconds of variability, you cannot distinguish a 10% load from a 5% load. Precise timing turns sled pulls from "it felt heavy" into a quantified training stimulus you can adjust session to session.

Collecting precise times is only useful if you interpret them correctly. Here are three principles for turning sprint timing data into training decisions.

Look at Trends, Not Individual Runs

A single sprint time is influenced by dozens of variables: wind, temperature, fatigue from yesterday's workout, what you ate, your warm-up quality. No single rep tells you much on its own. Instead, look at rolling averages across sessions. If your best flying 30 time has gone from 3.45 to 3.38 over the past month, that is a real trend—even if individual sessions fluctuated.

Compare Across Sessions, Not Just Within

It is tempting to focus on session PRs, but the more valuable comparison is between sessions. Did your average rep time improve? Did your drop-off threshold extend by one rep? Did your block start consistency tighten? These cross-session patterns reveal whether your program is working better than any single fast rep.

Set Realistic Targets

Sprint improvement is nonlinear. A beginner might drop 0.3 seconds from their 40-meter time in a month. An advanced sprinter might fight for 0.05 seconds over an entire season. Use your timing data to set targets that match your training age and current level. If you have been running 4.90-second 40s consistently, targeting 4.80 over the next training block is ambitious but achievable. Targeting 4.50 is not—and chasing an unrealistic number leads to overtraining and frustration.

Getting Started

All four of these drills use a two-phone setup — one at the start line and one at the finish. For drills that benefit from split timing (block starts, in-and-out 60s), check out our multi-phone setup guide. TrackSpeed handles the detection and timing automatically—place your phone, start the session, and sprint. Every rep is timed and saved so you can track your progress over weeks and months.

Start with the drill that matches your current training focus. If you are working on top speed, begin with flying 30s. If acceleration is the priority, use block starts to 20 meters. If you want to quantify the effect of sled work, try resisted sprint comparisons. The key is consistent measurement: same distance, same setup, same protocol, so the only variable is your performance.