What are the key considerations for deciding whether to prioritize strength or endurance in a gym workout routine specifically tailored for cyclists, and are there any general principles that can be applied to determine the optimal balance between the two, or does it ultimately come down to individual goals and riding styles? For example, how might a cyclist training for a long-distance event prioritize their workouts differently than one competing in shorter, more intense events, and are there any specific exercises or training methods that are more effective for building strength versus endurance? Should cyclists focus on building overall muscular strength, or is it more effective to target specific muscle groups, such as the legs or core, and what role do factors like power-to-weight ratio, cadence, and overall cardiovascular fitness play in determining the relative importance of strength versus endurance in a cyclists gym workout routine?