Moderate vs Vigorous Exercise

How can I tell an activity at a moderate level from a vigorous one?

Vigorous activities take more effort than moderate ones. Here are just a few moderate and vigorous aerobic physical activities.Do these for 10 minutes or more at a time.

Moderate Activities
(I can talk while I do them, but I can't sing.)

• Ballroom and line dancing
• Biking on level ground or with few hills
• Canoeing
• General gardening (raking, trimming shrubs)
• Sports where you catch and throw (baseball, softball , volleyball)
• Tennis (doubles)
• Using your manual wheelchair
• Using hand cyclers-also called ergometers
• Walking  briskly
• Water aerobics

Vigorous Activities
(I can only say a few words without stopping to catch my breath.)

• Aerobic dance
• Biking faster than 10 miles per hour
• Fast dancing
• Heavy gardening (digging, hoeing)
• Hiking uphill
• Jumping  rope
• Martial arts (such as karate)
• Race walking, jogging, or running
• Sports with a lot of running (basketball, hockey, soccer)
• Swimming fast or swimming  laps
• Tennis (singles)