Short answer: Most sports research gives caffeine about 60 minutes before exercise, but the best timing depends on the source. Caffeine gum is absorbed faster, so it's usually chewed 5-10 minutes before you start. Drinks like coffee and energy powders are best 30-60 minutes out. Studies typically use 3-6mg of caffeine per kg of body weight. Zuum Extra Strength Energy Gum has 60mg per piece, and Zuum Performance Energy Powder has 120mg per sachet.
Caffeine is one of the most effective, best-researched performance aids in sport. But having it at the wrong time can mean it kicks in after your warm-up is over, or keeps you awake after an evening session. Here's how to time it properly.
What the research says about timing
The International Society of Sports Nutrition (ISSN) reviewed the evidence in its position stand on caffeine and exercise. On timing, it found:
- 60 minutes before exercise is the most commonly used timing in studies.
- The best timing likely depends on the source of caffeine.
- Caffeine gum may need a shorter wait than capsules before you start exercising.
That last point matches what we know about absorption. In a study comparing caffeine gum with capsules, caffeine from gum reached its peak in the blood at around 44-80 minutes, compared with 84-120 minutes for capsules.
Timing guide by caffeine source
| Caffeine source | When to have it | Why |
|---|---|---|
| Caffeine gum (e.g. Zuum Extra Strength) | 5-10 minutes before | Partly absorbed through your mouth, so it works faster |
| Energy powder in water (e.g. Zuum Performance) | 30-60 minutes before, then sip during | Absorbed through the gut, and also hydrates you |
| Coffee | 30-60 minutes before | Absorbed through the gut |
| Caffeine capsules or pills | About 60 minutes before | Slowest to absorb |
A 2024 review of 32 caffeine gum studies found most researchers had athletes chew the gum for 5-10 minutes shortly before exercise. Some studies also gave gum during long efforts or between sprints.
How much caffeine before training?
The ISSN found caffeine consistently improves performance at 3-6mg per kg of body weight, and the minimum effective dose may be as low as 2mg per kg. Very high doses (around 9mg per kg) brought more side effects without extra benefit.
| Body weight | 2mg/kg (low) | 3mg/kg (moderate) |
|---|---|---|
| 60kg | 120mg | 180mg |
| 75kg | 150mg | 225mg |
| 90kg | 180mg | 270mg |
Food Standards Australia New Zealand recommends adults have no more than 200mg in a single serving and 400mg a day from all sources. For most people, the lower end of the research range is the sensible place to start.
With Zuum:
- 2 pieces of Zuum Extra Strength Energy Gum = 120mg
- 1 sachet of Zuum Performance Energy Powder = 120mg
- 2 pieces of Zuum Everyday Energy Gum = 60mg, for lighter sessions
The right dose comes down to your body weight, your caffeine tolerance and personal preference. Try it at training before you rely on it on game day, and always follow the directions on the pack.
Sample timing plans
Morning gym session
- Coffee with breakfast, 60 minutes out, or
- 2 pieces of Zuum Extra Strength 5-10 minutes before your first set.
Team sport (AFL, rugby, football, netball)
- 1 sachet of Zuum Performance in your bottle in the hour before the game, sipped through the warm-up.
- 1-2 pieces of Zuum Extra Strength at half-time for the second half.
Long run or ride
- 1 sachet of Zuum Performance before you head out, for caffeine and electrolytes.
- Chew a piece of gum later in the session if you need a lift.
Evening session
- Keep the dose low, or skip caffeine altogether.
- In a sleep study, 400mg of caffeine taken 6 hours before bed still significantly disrupted sleep. If you train late, a single piece of Zuum Everyday (30mg) is a gentler option.
Common timing mistakes
- Having coffee in the car on the way to training. It may not peak until your session is half over.
- Taking a big dose late in the day. Good for the session, bad for your sleep and recovery.
- Going straight to a high dose. More isn't better, and side effects like jitters and an upset stomach go up.
- Trying something new on game day. Test your timing and dose at training first.
Frequently asked questions
How long before a workout should I have caffeine?
Most research uses about 60 minutes before exercise for drinks and capsules. Caffeine gum is faster, so 5-10 minutes before is usually enough.
When should I chew caffeine gum before exercise?
About 5-10 minutes before you start. That's how most caffeine gum exercise studies were run.
How much caffeine should I have before training?
Research typically uses 3-6mg per kg of body weight, with benefits possibly starting at 2mg per kg. FSANZ recommends adults have no more than 200mg in a single serving.
Can I have caffeine before an evening workout?
You can, but keep the dose low. Caffeine taken 6 hours before bed can still disrupt sleep.
Is caffeine gum or powder better before training?
Gum is faster and more portable. Powder adds electrolytes for hydration. Many athletes use powder before and during long sessions, and gum for a quick lift.
The bottom line
The best time to take caffeine depends on how you take it. Have drinks 30-60 minutes out, and chew gum 5-10 minutes before you start. Start at the lower end of the dose range and keep caffeine away from bedtime. For training, try Zuum Extra Strength Energy Gum for a fast hit, or Zuum Performance Energy Powder for caffeine and electrolytes in one. Read more in caffeine and electrolytes: why they work better together.
