What is the fine-grained topic of the following text: Lots of the longer hikes have basic referrals for your health and fitness level or they may well call for that you have a specific amount of trekking direct exposure afore you take them due to the fact that the size of the walking might be hard for an unhealthy person to complete in a secure fashion and on time with the remainder of the party. Only return the topic.
Fitness and preparedness requirements for long hikes