training.
The Force-Velocity Curve
Before going into what the chains and bands do, I first have to set the groundwork and explain what the force-velocity curve is. As you see below, when force (weight lifted) increases, velocity (bar speed) decreases. So at the top where force is high and velocity is low, it is considered maximal strength. As you work down the graph, strength-speed is next. In the middle of the graph, you see power (the rate of force development, or RFD). As you continue down the graph, it becomes speed-strength and finishes with speed, where force is at its lowest and velocity is at its highest.
The reason this is important is that chains and bands give you the ability to develop explosive strength. So instead of benching with high weight and slow velocity (maximal strength), or low weight with fast velocity (speed), you can work in the middle of the graph and accelerate the bar in both the lowering and raising phases of the movement. Without the bands and chains, you have to decelerate the bar about halfway through the raising phase of a bench press, or the bar will fly out of your hands. Bands and chains ensure that you drive the bar as hard as you can, generating a high rate of force through the full range of motion (more on this below). The bottom line: Using bands and chains increases your rate of force development (RFD) and forces you to not let up after you get past your sticking point.
How Bands and Chains Work
Bands and chains do an excellent job of matching your leverage. The bar is lightest when your leverage is at its weakest, and the bar gradually increases in weight as leverage improves. Let’s break this down even further. You are getting ready to bench with 200 pounds on the bar. You add chains that each weigh 30 pounds. So now the bar total is 260 pounds. However, at the start position, half of the chains are lying on the ground, bringing you to a total of 230 pounds. As you bring the weight down to your chest, the bar gets lighter because more of the chains are lying on the ground. So when the bar is at your chest, you bring the weight down to the 200 pounds that you started with. As you press the weight up, more of the chains come off the floor, gradually increasing the bar total back to the 230 pounds at the top. This idea forces you to drive the bar out into full extension without letting up.
The Benefits of Accommodating Resistance
Bands and chains train acceleration and rate of force development, which is great for the development of power. If you are an athlete, the key to improved sport performance is producing more force in less time. This results when an athlete can absorb more force eccentrically (lowering phase), allowing you to apply higher levels of force concentrically (rising phase) in less time. Sport performance is about which athlete can absorb more force, enabling the athlete to produce more power. The biggest improvements that you will see by using this method are increased power, speed, and explosive strength.
Whether or not you are an athlete, using this method is definitely a game changer if your goal is to move a lot of weight and be explosive. I hope this post answers your questions on whether this type of training is right for you. If you are interested in trying this, be sure to ask a coach to make sure the setup is right, and always have a spotter to ensure safety.
This blog was written by Josh Jones, MS, CSCS, USAW, NIFS Athletic Department Trainer and creator of the NIFS Barbell Club. For more information contact Josh by email. Learn more about the NIFS bloggers.


beverage, it will be more challenging to reach for the food!
The holidays are known as a time of temptation, bustling around, and busy schedules. It’s part of what makes me love the holiday season so much. Despite the cheerful feelings in the air, many times when we get busy, nutritious foods and regular exercise are the first things to go!
runners of all experience levels participating. The atmosphere was so happy and inviting! Having the race to look forward to kept me on task for the month of November, as I knew I needed to stay in shape to complete the race and feel good the rest of the day. I enjoyed the race so much that I have signed up for a race every year since, and now I am getting my family involved!
I know how it feels to have a big exam coming up that consumes every thought in my head, or extra work that needs to be completed away from the office. Having things like this on my mind have made me feel guilty about taking the time out of my schedule to get some physical activity in. Luckily, I have found a way to squeeze in some extra work while getting my exercise in. Read your notes while riding a stationary bike, running on the treadmill, or using the elliptical. It may not be your preferred mode of activity, but it is still movement. Combining the two things on your to-do list will hopefully give you a little break in your schedule so you can spend your spare time celebrating rather than at the gym.
stay focused and not miss any appointments I may have coming up, and that includes my workout appointment with myself! I pack my entire bag the night before so I can get up early to work out before my day starts or hit the gym right after work—if you are lucky, squeeze it in during lunch! No matter what, your bag will be packed and ready to go, leaving you with no excuses.
groups. These exercises can range from beginner to advanced, with the functionally basic movement of 
There are other “tools” you can use while on the go that you may not realize. For a cardio option, most hotels have a staircase. Use it! Avoid the elevator and take the stairs instead. For a challenge, run the stairs for ten minutes (and because most people use the elevator, it should be mostly empty for your use). Suitably known as a suitcase carry, your suitcase can be used for a one-sided 

6th annual Lifestyle Program Silent Auction.
my morning by getting up and exercising, which helps me to feel good throughout the day.” 
year can be very good for us. Here are some superfoods and recipes to incorporate into your annual holiday feasts!





