Meet the Vasa Swim Ergometer: a cool machine that helps you work on your power and stamina. It measures time, distance, pace, stroke rate, and left / right arm power. You can try various strokes – freestyle, butterfly, breaststroke, and backstroke. The resistance, stroke rate, and power can be adjusted.
The Vasa Swim Erg improves your technique and gives you a good workout. It is great for rehabilitation and injury prevention. The above video shows what this machine has to offer.