I have a old Lyfecycle 5500R. It gets very hard from the beginning of the exercise even in the lower setup. What could it be?

Is it painful? Is it the lower leg or thigh? Is it just the one leg? Does the leg appear discoloured? (ie: blue, inflamed or pale?)
It could be over exercise that has made it hard. It could, in a worst case scenario, be a blood clot in the leg.
How old are you?
Are you on medication, particularly for circulatory problems?
Have you seen your GP?

Here are a couple of thing that perhaps you didn't already know and that will change your perception about working out.

Click Here :Advantages of Weight Benches and How You Benefit from Them

1. Doing targeted exercises like sit-ups and crunches will not get you a six-pack. They will strengthen your abs, but a six-pack is more about % body fat than about strength.
2. As you improve your cardiovascular health, your resting heart rate becomes lower and lower. It's pretty easy to get your resting heart rate under 60 beats per minute. Lance Armstrong's heart beat at 32-34 bpm.
3. If you work out at a high intensity for 45 minutes, your body's metabolism stays elevated for up to 14 hours. In addition to burning calories during the workout, your body will burn an extra 150-200 calories in the hours after a workout.
4. It's a general belief that cardiovascular exercises boost fat loss better than weight lifting exercises. In reality it's opposite - lifting weights not just build muscles but plays a bigger and faster role in fat loss as well.
5. Skipping meals = starving your body. Contrary to popular belief, this INCREASES your fat storage.
6. To get the most out of your fitness you need to make sure you rest! You can't build muscles on activity alone. Your body needs the rest time to actually do the muscle building. Exercise is only the work order - not the construction process.
7. Exercising actually helps your brain grow new brain cells.
8. The results of a new study from the University of Alabama in Birmingham, that looked at the effects of exercise for women over the age of 60, suggests that women in this age range may only need to exercise once a week to gain significant benefits in their strength and endurance.
9. Exercise releases endorphins, which create feelings of happiness and euphoria. Studies have shown that exercise can even alleviate symptoms among the clinically depressed. In some cases, exercise can be just as effective as antidepressant pills in treating depression.
10. And then, there's this.

Click Here: A Thorough Guide Showing How To Use A Weight Bench Properly

if it's computerized, it could be the computer or a sensor may have gone bad

Yes, Vital Fitness RB 360 exercise bike requires 6 volts DC because it is comfortable for exercise and also are safer because they are lower to the ground and result in less impact on the knees and lower back.

It should come on once you begin to pedal. If it is not coming on, then start by checking the voltage of your battery. Chances are it is low or even completely discharged.
Battery 6 Volt Stairmaster SM14123 SPORTSMITH net

You can use the Body by Jake Ab and Back Plus to target and tone your frontal abdominal muscles, waist and rear obliques and to strengthen the muscles in your lower back. The exerciser comes with torsion disks that allow you to vary the level of resistance. Use one disk if you're a beginner, two disks for an intermediate level workout and three disks for an advanced workout. There are only four exercises to do, known as the "Fit Four." With consistent workouts you'll begin to see results and feel stronger in your core.

Step 1

Align the arrow on the handle bar with the arrow marked "Ab" on the exerciser and place a disk in the hex shaft.

Step 2

Seat yourself comfortably and place both your feet under the ankle pads.

Step 3

Do the Abdominal Crunch. With your elbows at your side, grip the handles, curl your body forward in a controlled manner and then return to the starting position to complete one repetition. Contract your abdominal muscles when curling forward, making sure the movement comes from your abdominal muscles and not your arms. Do 15 to 30 repetitions.

Step 4

Do the Side Twist. Bend your legs, raise your feet and cross your ankles in the seated position. Hold the handle bars firmly and swing your lower body from the right side to the left, making sure you move using your oblique muscles. Your upper body should be kept as stable as possible. Movement from right to left completes one repetition. Do 15 to 30.

Step 5

Do the Oblique Crunch. Position your seat slightly to the left. Place your feet in the left ankle support pad. Put your knees together, grip the handles with both hands and curl forward slowly. Return to the starting position and repeat 15 to 30 times. Now angle your seat slightly to the right, place your feet under the right ankle support pad and repeat the exercises for your other side.

Step 6

Do the Back Extension. Remove the torsion disk and align the arrow on the handlebar with the arrow marked "Back" on the exerciser. Place a torsion disk back on the hex shaft. Sit comfortably in the seat with your hands gripping the handles and your feet under the ankle support pads. Ensuring your back is pressed against the upper pad, lean back slowly and then return to the starting position to complete one repetition. Repeat 15 to 30 times.

Step 7

Perform the exercises in the following order to complete one circuit: Abdominal Crunch, Side Twist, Oblique Crunch and Back Extension. Once you have completed one circuit, do another circuit from the beginning.

Step 8

Work out for 10 minutes at least three times a week. As you become stronger in your core and can comfortably complete 30 repetitions of each exercise, add another resistance disk.

Tips and Warnings

• Before you begin exercising, warm up and stretch for five to 10 minutes. To gain maximum benefits, don't rest between exercises.
  

• Ensure the torsion disks are placed correctly on the hex shaft; the slot on the torsion disk should be aligned with the round rod. Consult your health care provider before starting any exercise program to prevent the risk of injury.
  

Read more: http://www.livestrong.com/article/40450-use-body-jake-ab-back/#ixzz2GCOW86kL

The alinement is out. Check balljoint's and track-rod end's.Check these part's replace faulty part's and get it alined after.Cheer's

You just bought it - contact the seller, or contact Schwinn Fitness:
http://www.schwinnfitness.com/schwinn_fitness_us/homepage.jsp

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

http://www.makita.com/en-us/Assets/images/Products/G5501R/owners_manuals/G2400R,3500R,5500R,01R%203ZZ9020054.pdf