Description
USN Cramp Block Tablets are a high-potency electrolyte and mineral formula engineered to prevent muscle cramping, buffer lactic acid, and maintain optimal hydration during intense physical activity. Specially formulated for endurance athletes, rugby players, runners, and heavy trainers across New Zealand, this targeted anti-cramping supplement restores vital micronutrients lost through heavy sweat, allowing you to train harder for longer without painful interruptions.
Key Benefits & Features
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Prevents Painful Muscle Cramps: Delivers a balanced spectrum of bioavailable electrolytes to eliminate cramping in high-demand muscles like calves, hamstrings, and quads.
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Rapid Hydration & Electrolyte Balance: Replenishes essential minerals, including magnesium, potassium, sodium, and calcium, lost rapidly during heavy sweating.
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Lactic Acid Buffering: Formulated with sodium bicarbonate to help buffer muscular acidity and delay the onset of physical fatigue during sustained output.
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Supports Optimal Muscle Function: Enhances neuromuscular signalling, ensuring smooth, efficient muscle contractions under maximal strain.
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Convenient Easy-to-Swallow Tablets: Simple, mess-free tablet delivery makes it effortless to carry in running belts, jersey pockets, or gym bags for on-the-go use.
How It Works
During prolonged endurance sessions or high-intensity interval training, the body loses vast amounts of vital electrolytes through perspiration. A deficit in intracellular minerals—particularly magnesium, potassium, and sodium—disrupts nerve-to-muscle electrical impulses, leading to acute neuromuscular fatigue, muscle spasms, and severe cramping.
USN Cramp Block works by rapidly replenishing these critical electrolytes in optimal ratios to restore neuromuscular balance. Additionally, the inclusion of sodium bicarbonate acts as a natural systemic buffer against hydrogen ion accumulation (lactic acid build-up), preventing burning sensations in working muscles, preserving stamina, and accelerating recovery times between heavy efforts.
Recommended Use
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Pre-Event / Pre-Workout: Take 2 tablets 30 minutes prior to high-intensity training or endurance events with 250–300ml of water.
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During Activity: For extended endurance events exceeding 60–90 minutes, take 1 to 2 tablets every 30–60 minutes as needed, washed down with adequate fluid.
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Post-Workout Recovery: Take 2 tablets immediately following strenuous exercise alongside your post-workout hydration to accelerate mineral replenishment.
Facts
Container Size: 30 tablets

Shipping
All orders $60 and over receive Free* Shipping Nationwide
Final pick up each day is at 3.45pm Monday to Friday.
Estimated Delivery Times*:
Auckland and North Island – Overnight
*During sale periods, please allow an additional 1–2 business days for dispatch due to high order volumes.
However many Auckland orders will be delivered the same day depending on what time the order is placed
South Island – Overnight (For larger parcels allow 2 business days)
Same Day/Evening Express Shipping upgrade available at checkout for select suburbs*
Click here to view the full Shipping Details and Returns Policy.
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