CSS training focuses on improving your lactate threshold speed, to help Swimmers swim faster and further with less (effort) pain.
Honing into your threshold speed is perfect for distance swimmers and triathletes wanting faster race performance.
Download the CSS Calculator and take your training to the next level.
To DOWNLOAD your FREE copy type $0 in the amount box; otherwise choose what you want to pay OR use the 'suggested amount' to buy me a coffee :)
The quick how-to for calculating your CRITICAL SWIM SPEED