Very strenuous or competitive exercise should be avoided. Exercise that is not too strenuous is recommended. This also allows for increased heat dissipation during strenuous exercise. Overtraining occurs when a person exceeds their body's ability to recover from strenuous exercise. The production rate can increase more than tenfold from resting to strenuous exercise. Preissnitz's treatments also included a great deal of less strenuous exercise, mostly including walking. Fansipan can be climbed in a steep and fairly strenuous hike. The trail is rocky and moderately strenuous. An increase in AMP concentration, which occurs during strenuous exercise, signals energy demand. Patients are advised to avoid heavy lifting and strenuous activities for a week. Caffeine is capable of increasing work capacity while individuals perform strenuous tasks. It was strenuous and somewhat dangerous work. That injury was described at the time as a knee injury incurred during strenuous rehearsals. Finding a structure for the soundtrack was arguably the most strenuous task. Neves had undertaken a very strenuous campaign agenda.