Klean Pre-Workout by Klean Athlete

If you want better endurance without a heavy caffeine hit, a beet pre-workout fits. Nitrate-rich beet root can modestly improve time-trial results in runners, cyclists, and team-sport athletes, especially if your training is submaximal or interval-based. The 75 mg caffeine here is about a small coffee, helpful for focus if you are caffeine-sensitive or train later in the day. If you’re already highly trained, expect smaller gains but still useful oxygen-efficiency benefits.

Beet root nitrates convert in your mouth to nitrite, then to nitric oxide in blood, which relaxes blood vessels and helps muscles use oxygen more efficiently. That can lower the oxygen cost of a given pace and improve repeated sprint performance within hours. Caffeine blocks adenosine receptors (the brain’s drowsy signal), reducing perceived effort and sharpening reaction time at a gentler dose than typical pre-workouts. Vitamin C helps recycle nitric oxide, and the small amount of sodium supports fluid balance.

Mix one scoop in water 30 to 120 minutes before training; nitric oxide peaks closer to two hours for many people. For key races, use it daily for 3 to 7 days beforehand, then your usual pre-event dose. Skip antibacterial mouthwash or antiseptic gum for several hours around dosing because oral bacteria drive nitrate conversion. Evening sessions: the 75 mg caffeine is mild, but if sleep is fragile, take it earlier.

If you have low blood pressure, take nitrates cautiously and check how you feel during easy sessions first. Skip if you use prescription nitrates for chest pain, and talk to your clinician if you take blood pressure medication or PDE-5 inhibitors for erectile dysfunction since effects can add up. History of calcium oxalate kidney stones: beet concentrates can raise oxalate, so consider alternatives. If you’re pregnant or have arrhythmias or panic-level anxiety, avoid caffeine-containing pre-workouts.