Skills Tests should be a part of your workout every 4-5 weeks, to see your progress.  

One great core test is the Plank Circuit: 

Position a watch or clock where you can easily see it

1. Start in the plank exercise position, Hold for 60 seconds
2. Lift your right arm off the ground, Hold for 15 seconds
3. Return to start/plank position, Hold for 15 seconds
4. Lift your left arm off the ground, Hold for 15 seconds
5. Return to start/plank position, Hold for 15 seconds
6. Lift your right leg off the ground, Hold for 15 seconds
7. Return to start/plank position, Hold for 15 seconds
8. Lift your left leg off the ground, Hold for 15 seconds
9. Return to start/plank position, Hold for 15 seconds.

You do not have to complete the entire Plank Circuit the first time, in fact its great if you cannot finish it.  Your goal should be to accomplish more of the circuit with every 4-5 week Skills Test.  Within a few months, I hope you are capable of completing the entire circuit.

Getting the Most out of your Workout

Suggestions for getting the most out of your summer workout:
    Heart-rate monitor (Polar brand)
    Gym membership (YMCA/The Training Lofte)
    Train with a friend
    Play travel ball :: #1 goal-work on hitting
    Log your workouts, set daily workout time aside (same schedule every day is best)
    Enjoy the break and have fun!

Training The College Athlete

Whether you are entering college or a three-year all-american, summer workouts are essential to build strength, agility, and power.  Without your summer workout program, you will lose the competitive edge in strength and speed.

Here is an example of a great summer workout for the college-athlete:
Dailies:  
        8 minute warm-up run (1 mile)
        Stretch
        6 sets of 25 core strength exercises
        3 sets of 25 back exercises
        50 pushups
        50 swings
        Stretch

Plyometrics and Agilities: 2 days/week
        Dot drill (under 60 seconds)
        Jump rope (5 minutes)
        Ladder (under 3 minutes)
        5-on-5 sprint workout
        Base-sprints (1-First, 2-Second, 3-Third, 4-Home)
        Quick Lunges (5 sets of 10)

Strength Training: 2 days/week
        Rotator cuff
        Bicep curls
        Bench Press
        Military press
        Overhead tricep extension
        Flies
        Back Exercise
        Plank circuit
        Seated leg curls
        Seated leg extension
        Calf raises
        Inverted leg extension
        Lying hamstring exercise
        Full-body workout

Endurance Training: 1 day/week
        45-min cardio (bike, rollerblade, jog, swim, boot-camp, spin, power yoga, etc