1. involving or requiring physical or mental effort; tending to exert or put forth effort
Usage: formal or technical usage; less common than 'exerting' or 'exertional'

Examples

• The exertive nature of the workout left her exhausted.
• Swimming is an exertive activity that builds cardiovascular strength.
• The exertive demands of the job required both physical and mental stamina.
• He found the exertive process of learning a new language challenging but rewarding.