Modifiers matching sessions:

• supplementary,
• strenuous,
• interactive,

Simple categories matching strenuous:

• sport,
• activity,
• effort,
• situation,
• job,
• endeavor,
• event,
• exercise,
• exertion,
• work,
• game,
• occupation,
• use,
• works,
• athletics,
• thing,
• workout,
• sessions,
• training,
• exercising,