MORE QUICK-FIRE QUESTIONS

Q What does CdA mean, please?

A A Cd is your co-efficient of drag whereas A is your frontal area. Combine the two and you have an aerodynamic measurement called CdA, which ranges upwards of zero. Take a brick. This might come in at around 2.0. This is very resistant. Compare that to teardrop-shaped bars that can register an aero 0.005. An elite triathlete with aerobars measures around 0.18- 0.25, while a good amateur is more like 0.30. Your aim is to generate a high

wattage and low CdA. This too can be measured as watts per m2 CdA..

Q Do I need to wear a bike helmet?

A Bike helmets are mandatory at races and arguably should be mandatory in training, too. Either way, all helmets from reputable manufacturers and retailers will satisfy the respective safety criteria. They also come with vents to offer a cooling effect from your vigorous sessions. Like every piece of your triathlon equipment, comfort is vital. When it comes to a helmet, this is achieved via the shape of helmet and internal padding. More experienced triathletes might choose a teardropshaped helmet for racing. These reduce drag, though are often less comfortable and can heat up swiftly. A good compromise is an aerodynamic road helmet that provides both comfort and slipstreaming.

Q Why is Vaseline not recommended for wetsuits?

A Vaseline is petroleum-based, so will degrade the material over time. Instead, you can use baby oil, body glide, vegetable oil or silicone gel.