Legal nutritional supplements available which are reported to improve exercise performance. Caffine - review the available scientific literature and provide a clear conclusion on whether you would recommend it to athletes. To help guide your discussion consider including the following aspects in your evaluation: Classification and Usage, Sport Performance, Mechanisms, Effectiveness, Safety, Legal and Ethical Aspects. The essay should not exceed 1250 Words, be line double spaced and should use the Sport and Exercise Science Harvard referencing Style