It is likely the score you see for force on the StrengthErg will differ from the score you get using traditional free weights over the same exercise, such as for the leg press.

In traditional weight training, the amount you can lift is determined by your weakest point in the movement, leaving the stronger parts of the lift under-challenged. The StrengthErg, however, automatically adjusts resistance to match your effort, ensuring your muscles are fully engaged throughout the entire motion. Where you can push harder, the resistance increases, maximizing the effectiveness of every part of the rep. With concentric training, there is also no resistance on the return of the movement.

The StrengthErg minimizes injury risk by eliminating the need to manage heavy weights. Its responsive resistance makes it a safer and more accessible option for all users. Traditional weight training often requires a spotter to ensure safety, especially for those handling heavier loads where lift failure can occur. With the StrengthErg, you cannot fail a rep.

Unlike other Concept2 equipment such as the RowErg, it is possible to use the StrengthErg without a Performance Monitor. This is because all the calculations are done in a hub called ErgLink that sits below the flywheel. Both the monitor and ErgData connect wirelessly to ErgLink. Using ErgData, which can be done with or without the monitor, will give you the most detailed data.

If the StrengthErg will be in a multi-user environment like a gym, or used by people who may not necessarily have ErgData, then we recommend that you buy the StrengthErg with a Performance Monitor. This allows anyone to use the StrengthErg and view their workout with no additional device or app needed.

If the StrengthErg will only be used in a home gym, and with a limited number of users who will always be using ErgData to record their results, you may wish to purchase it without a Performance Monitor and just use ErgData to view your workout.

Force: At the completion of each rep the monitor will calculate and display the average force you have applied through the range of the movement.  When you have ended your set the result screen will display the set average force, as well as the value of your best rep of that set. Force can be shown in either pounds or kilograms.

Work: Work is a combination of the force you apply and the distance of your movement. Work is calculated and displayed for each rep. It is also accumulated during the set to give a total work value. Work is recorded in kilogram-meters.

Your Rep count is displayed. And a Rep timer will keep you aware of cadence. If you have connected with a heart rate monitor, heart rate will display on the monitor

Using ErgData, you can see all of the above, plus some additional metrics for each rep:

• Drive Length
• Drive Time
• Drive Speed
• Time Under Tension

There are two key phases of muscle movement: concentric (muscle shortening) and eccentric (muscle lengthening). The concentric section is the part of the exercise usually considered as the lift portion—it’s the pressing bit of a bench press or lifting the bar from the ground in a deadlift. The Concept2 StrengthErg focuses on the concentric movements offering a controlled and efficient way to strengthen muscles without the added strain of eccentric loading.  Between reps there is no resistance and should be used as recovery.

The StrengthErg will suit anyone who wants the benefits of traditional resistance training. If you're looking to build muscle, maintain performance, or develop muscular endurance, the StrengthErg will help you.

The safe, guided nature of the StrengthErg makes it ideal for people new to strength training, as well as groups like juniors or the active aging market, where the possibility of lifting to failure may want to be avoided. It also makes it ideal for testing individuals who may or may not have weight training experience.

The compact footprint of the StrengthErg makes it suitable for smaller locations, where squat racks, benches, bars and spare weights can take up a lot of space and weight.

The StrengthErg can also be used by a wide range of athletes without requiring any adjustment, so if you're training in groups, it makes for a much quicker and more efficient workout without the need to adjust weights or settings each time.

Muscles Used for Chest Press
Primary muscles: pectorals
Secondary muscles: deltoids, triceps 

Muscles Used for Leg Press
Primary muscles: quadriceps femoris (quads), gluteal muscles (glutes)
Secondary muscles: abductors, hamstrings, calves

Muscles Used for Seated Row
Primary muscles: latissimus dorsi (lats), trapezius, deltoids, back extensors
Secondary muscles: biceps, forearms