Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to prepare for a cycling race [title] Make sure you are physically conditioned to compete in the level of race you are registered for. [step] If you've been out of cycling practice for a while, don't go on that 70 mile (110 km) tour. [title] Make sure your bike is properly maintained.

Ending1: [step] If your bike is broken up, do not ride for it. If your bike is worn, worn underwire, or has a break, it could lead to serious injury and will prevent you from reaching the starting line. Ending2: [step] A great cyclist is only as strong as their bike. [substeps] Having sturdy tires is the most important component of any race. Ending3: [step] You don't want to run away from your bike and spill anything on your bike or look ill in the race. Otherwise, you are in serious trouble, and the very best approach is for you to get something to pedal hard on, namely, a kickstand. Ending4: [step] Lastly, make sure there are no dangerous lumps or bumps that may tip it over. Always check one before you go out on the road.

Answer format: ending1/ending2/ending3/ending4