List clearly and precisely the assessment methods of muscular endurance and put the standard norm for each test based on age ?

Assessment methods for muscular endurance can vary depending on the specific muscle group being tested. Here are some commonly used assessment methods along with standard norms based on age:

1. Push-Up Test:
- Method: Perform as many push-ups as possible with proper form.
- Norms:
- Age 20-29: Men: 35-44 push-ups, Women: 20-29 push-ups
- Age 30-39: Men: 24-34 push-ups, Women: 17-27 push-ups
- Age 40-49: Men: 20-29 push-ups, Women: 13-23 push-ups
- Age 50-59: Men: 15-24 push-ups, Women: 10-20 push-ups
- Age 60+: Men: 10-19 push-ups, Women: 6-16 push-ups

2. Sit-Up Test:
- Method: Perform as many sit-ups as possible in a given time (usually one minute).
- Norms:
- Age 20-29: Men: 40-49 sit-ups, Women: 33-42 sit-ups
- Age 30-39: Men: 35-44 sit-ups, Women: 28-37 sit-ups
- Age 40-49: Men: 30-39 sit-ups, Women: 22-31 sit-ups
- Age 50-59: Men: 24-34 sit-ups, Women: 18-27 sit-ups
- Age 60+: Men: 17-27 sit-ups, Women: 11-20 sit-ups

3. Plank Test:
- Method: Hold a plank position for as long as possible.
- Norms:
- Age 20-29: Men: 1 minute 30 seconds - 2 minutes 30 seconds, Women: 1 minute - 2 minutes
- Age 30-39: Men: 1 minute 15 seconds - 2 minutes 15 seconds, Women: 50 seconds - 1 minute 50 seconds
- Age 40-49: Men: 1 minute - 2 minutes, Women: 40 seconds - 1 minute 40 seconds
- Age 50-59: Men: 45 seconds - 1 minute 45 seconds, Women: 30 seconds - 1 minute 30 seconds
- Age 60+: Men: 30 seconds - 1 minute 30 seconds, Women: 20 seconds - 1 minute 20 seconds

4. Handgrip Strength Test:
- Method: Squeeze a handgrip dynamometer as hard as possible.
- Norms (based on average grip strength in kilograms):
- Age 20-29: Men: 45-55 kg, Women: 25-35 kg
- Age 30-39: Men: 40-50 kg, Women: 22-32 kg
- Age 40-49: Men: 35-45 kg, Women: 20-30 kg
- Age 50-59: Men: 30-40 kg, Women: 17-27 kg
- Age 60+: Men: 25-35 kg, Women: 15-25 kg

It's important to note that these norms are general guidelines and can vary based on individual factors such as fitness level, body composition, and overall health. Consulting with a fitness professional or healthcare provider can provide more accurate assessments and personalized norms.