The BOB ankle mobility and calf stretching block by Exercise Bob

Exercise Bob - The BOB - Ankle Mobility Device

Name: Exercise Bob - The BOB - Ankle Mobility Device
Brand: Exercise Bob
SKU: BO-001
Price: 68.00 USD
Availability: InStock

Price

$68.00

$80.00 $68.00

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Apparel & Training Gear Sizing

FIND YOUR FIT

Apparel measurements are taken from the garment, laid flat, in inches, except the PARRY Core Shorts waist ranges shown in their chart. Elbow sleeve measurements are body circumferences; see the dedicated section below. Tolerances are listed where applicable. If you're between sizes, size up for a relaxed fit or down for fitted.

Category

T-SHIRTS

OG Gym, Nitro, WTB & Classic Tee

Men's, body length and chest width, laid flat, in inches

OG Gym, Nitro, WTB and Classic Tee size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL	4XL
Body Length	27	28	29	30	31	32	33	34
Body Length Tol.	1/2	1/2	1/2	1/2	1/2	1/2	1/2	1/2
Chest Tolerance	1/2	1/2	1/2	1/2	1/2	1/2	1/2	1/2
Chest Width	17 1/2	19	20 1/2	22	24	26	28	30

Camo Tee

Men's, length, chest and shoulder width, in inches

Camo Tee size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL	4XL
Length	24	26 1/4	28 1/4	29 1/4	30	31	32 1/4	33 1/2
Chest	17 1/4	18 1/4	19	21	23	25 1/4	27	28 1/4
Shoulder Width	14 3/4	16 3/4	18 1/4	20 3/4	22 1/2	23 1/2	24 1/2	26 1/2

Vintage Tee

Men's, body length, chest and sleeve, in inches

Vintage Tee size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL	4XL
Body Length	27	28	28 1/2	29 1/2	30 3/4	32 1/4	33 1/4	34 1/4
Chest Width	19 7/8	20 7/8	21 7/8	23 7/8	25 7/8	27 7/8	29 7/8	31 7/8
Sleeve Length	7 1/4	7 3/4	8 1/4	8 3/4	9 1/4	9 3/4	10 1/4	10 3/4

Category

TANKS

Men's OG Nitro Tank

Body length and chest width, laid flat, in inches

Men's OG Nitro Tank size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL
Body Length	27	28	29	30	31	32	33
Body Length Tol.	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1
Chest Tolerance	+/-3/4	+/-3/4	+/-3/4	+/-3/4	+/-3/4	+/-3/4	+/-3/4
Chest Width	16	18	20	22	24	26	28

Category

HOODIES & CREWS

Men's Hoodie

Body length, chest and sleeve from center back, in inches

Men's Hoodie size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL	4XL	5XL
Body Length	27 1/2	28 1/2	29 1/2	30 1/2	31 1/2	32 1/2	33 1/2	34	34 1/2
Body Length Tol.	1	1	1	1	1	1	1	1	1
Chest Tolerance	1	1	1	1	1	1	1	1	1
Chest Width	20 1/2	21	23	24 1/2	26 1/2	27 1/2	28 1/2	30	31 1/2
Sleeve Length	34 1/2	35 1/2	36 1/2	37 1/2	38 1/2	39 1/2	40 1/2	41	41 1/2
Sleeve Tolerance	1	1	1	1	1	1	1	1	1

Men's Lux Hooded Sweatshirt

Body length and chest width, laid flat, in inches

Men's Lux Hooded Sweatshirt size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL
Body Length	26 1/2	28	29 1/2	31	32 1/2	34	35 1/2
Chest Width	19 1/2	21	22 1/2	24	25 1/2	27	28 1/2

Crewneck Sweatshirt

Body length, chest and sleeve from center back, in inches

Crewneck Sweatshirt size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL	4XL	5XL
Body Length	26	27	28	29	30	31	32	33	34
Body Length Tol.	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1
Chest Tolerance	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1
Chest Width	18	20	22	24	26	28	30	32	34
Sleeve Length	32 1/2	33 1/2	34 1/2	35 1/2	36 1/2	37 1/2	38 1/2	39 1/2	40 1/2
Sleeve Tolerance	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1	+/-1

Category

BOTTOMS

Westside Barbell x PARRY Core Shorts — 7-inch Inseam

Black Core Shorts. Waist ranges and inseam in inches, sizes S through XXL.

Westside Barbell x PARRY Core Shorts waist ranges and 7-inch inseam in inches
Size	Waist range (in)	Inseam (in)
S	29–30	7
M	31–32	7
L	33–34	7
XL	35–36	7
XXL	37–39	7

Waist values for these shorts are listed as ranges. The general laid-flat waist instructions below do not apply to this chart.

Men's Jogger

Inseam, outseam and waist, in inches

Men's Jogger size chart in inches
Measurement	XS	S	M	L	XL	2XL
Inseam	28	29 1/2	30	30	30 1/2	30 1/2
Length Tolerance	1	1	1	1	1	1
Outseam	38	40	41	41 1/2	42 1/2	43
Waist	26 to 28	28 to 31	31 to 33	33 to 35	35 to 38	38 to 42
Waist Tolerance	1	1	1	1	1	1

Nitro Sweatpant

Inseam and waist, in inches

Nitro Sweatpant size chart in inches
Measurement	S	M	L	XL	2XL	3XL
Inseam	29.5	30	30.5	31	32	33
Waist	16.25	17.25	18.25	19.25	20.25	21.25

Westside Men's Sweatpants

J. America 8992. Garment measurements in inches, sizes S through 3XL.

Westside Men's Sweatpants (J. America 8992) garment measurements in inches
Measurement	S	M	L	XL	2XL	3XL
Waist Width (Laid Flat)	16.25	17.25	18.25	19.25	20.25	21.25
Inseam	29.5	30	30.5	31	32	33

How to measure: Lay the sweatpants flat and measure straight across the waistband from edge to edge. The waist values above are garment widths, not body waist circumferences. Measure the inseam from the crotch seam to the bottom hem along the inside leg. Compare with a pair of sweatpants that fits you well.

Source: S&S Activewear, J. America 8992 size specifications.

Category

WOMEN'S

Women's Original Gym Tee

Body length and chest width, laid flat, in inches

Women's Original Gym Tee size chart in inches
Measurement	XS	S	M	L	XL	2XL	3XL
Body Length	25 3/4	26 3/8	27	27 5/8	28 1/4	28 7/8	29 1/2
Body Length Tol.	1/2	1/2	1/2	1/2	1/2	1/2	1/2
Chest Tolerance	1/2	1/2	1/2	1/2	1/2	1/2	1/2
Chest Width	15 1/2	16 1/4	17 1/4	18 1/4	19 3/4	21 1/4	22 3/4

Training Gear

ELBOW SLEEVES

7mm Neoprene Elbow Sleeves

Body circumference measurements in centimeters and inches — not garment measurements.

Slightly bend your elbow 30° and measure your arm circumference 4 inches (10 cm) above the elbow joint.

Open the size-guide graphic at full size

Elbow sleeve body circumference measurements in centimeters and inches
Size	Forearm (cm)	Forearm (in)	Lower Biceps (cm)	Lower Biceps (in)
S	24.1–29.2	9.5–11.5	26.7–33	10.5–13
M	26.7–31.8	10.5–12.5	30.5–36.8	12–14.5
L	30.5–35.6	12–14	33–40.6	13–16
XL	33–38.1	13–15	35.5–43.2	14–17
2XL	35.6–40.6	14–16	39.4–48.3	15.5–19
3XL	38.1–43.18	15–17	43.2–52.07	17–20.5

Reference

HOW TO MEASURE

Apparel measurements above are taken from the garment laid flat, except the PARRY Core Shorts waist ranges shown in their chart. For elbow sleeves, use the body circumference instructions in the Elbow Sleeves section. To compare against a shirt you already own and love, lay it flat on a hard surface and measure with a tape.

Body Length

From the highest point of the shoulder seam straight down to the bottom hem.

Chest Width

One inch below the armhole, measured straight across from edge to edge. Garment laid flat, not doubled.

Sleeve Length

From the center back of the collar, across the shoulder seam, all the way down to the sleeve cuff.

Shoulder Width

From the outer edge of one shoulder seam straight across to the outer edge of the other.

Inseam

From the crotch seam straight down the inside of the leg to the bottom of the hem.

Waist

Across the top of the waistband, edge to edge. Double the number for full waist circumference.

Tolerance is the acceptable variance per garment. A "+/- 1" tolerance means the actual measurement can be up to one inch over or under the listed size.

Still Stuck

NOT SURE WHICH SIZE TO ORDER?

If you're between sizes or sizing for a specific lift or sport, send us your height, weight, and what shirt size you wear from another brand. We'll point you in the right direction.

Email Orders

Quantity

30 Day Return

Secure payments

THE BOB - Revolutionize Your Leg Training

Achieve Balance, Strength, and Flexibility—In Just 3 Minutes a Day
Do you struggle with leg and calf exercises? Does the thought of stretching or strengthening your muscles sound more like a chore than a solution? THE BOB is here to change that, making leg training simple, effective, and even enjoyable.

The Problem:
Most people avoid exercising their legs, especially calves, because it can feel tedious or uncomfortable. But the reality is, if you neglect these muscles, you risk limited flexibility, poor balance, and even injuries like shin splints.

The Solution:
With THE BOB, you can stretch, strengthen, and enhance your leg muscles without pain or stress. Using a unique isokinetic exercise method, THE BOB allows you to work your Achilles, tibialis, and gastrocnemius muscles in ways you’ve never experienced. It’s not just effective—it’s fun! And in just 3 minutes a day, you’ll see incredible results.

How It Works:
Unlike other calf exercises, THE BOB keeps your toes straight, allowing you to achieve a full range of motion without stressing your knees. You’ll feel a gentle yet effective stretch as you rock your feet forward and backward, strengthening your leg muscles while keeping your natural movement intact. It’s ideal for any age and any fitness level.

Key Benefits:

Develop Balance, Strength, Speed, and Vertical Jump.
Improve Flexibility and protect against injuries like shin splints.
Isokinetic exercise targets muscles at a constant speed for maximum effectiveness.
No pain, no knee stress, and ideal for all ages.
Works the Achilles tendon, tibialis, and gastrocnemius for full-range stretching.
Simple to use, making it easy to integrate into any workout routine.

Why It’s Different:
THE BOB uses your natural body weight to safely strengthen your leg muscles, keeping you within your comfort zone while maximizing effectiveness. The innovative rocking motion promotes flexibility and enhances muscle development, all without putting strain on your joints.

Your Call to Action:
Don’t wait for injuries to sideline you—start building strength, balance, and flexibility with THE BOB today. Whether you're training for a sport or just want to improve your daily movement, this simple tool makes exercising your legs quick, easy, and fun.

Order THE BOB now and transform your lower body with just 3 minutes a day!

5 stars: 83 (98%)
4 stars: 1 (1%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 1 (1%)

Fantastic

I've been wanting to add the Bob to my programming for a few years. Now I've finally got it, and not was it worth the wait.

Quick Workout

The BOB is very durable and lightweight for quick use! The materials used to manufacture this product are not against health concerns as researched. It gives the needed stretch and building for the calves, ankles and possibly feet. Get it to build up your legs for future walks and runs with more endurance and energy;

The Bob

Fast shipping, great customer service, and everything arrived well packaged and in great condition. Will be ordering from Westside again in the future.

Easy to use calf stretcher

Great device for strengthening and stretching my calves.

Love the Bob! Easy to use

Great product. Calfs and tibs are mahooosive!!!

Exercise Bob

Excellent piece of equipment. Use it at home and the gym. Helps ALOT with stability as i have Parkinsons Disease. Lower body strength is CRUCIAL.

It is awesome

Stroke recovery

I purchased the "BOB" trying to find something that would help strengthen my ankles due to limited strength and mobility as a result of a stroke. I experienced almost immediate results after the first time. It is the "thing" I have been looking for!

Great Product

Great calf/ankle mobility and strength product. Really helped me to recover from an Achilles rupture

Best device for working the ankles and foot

Until about 2 years ago I had been using a wedge of oak wood for ankle, calf, and foot stretching and strengthening after a motorcycle accident when I first saw this on the internet. Bought one and it is one of the best devices for the purpose.

Recently had a colleague at work (construction) with some bad plantar faciitis and gave him mine. He had been seeing a doctor but getting very little relief, and was telling me how the doctor had recommended some exercises that didn't make sense to him how to do them. The exercises sounded like they could be done better with "The BOB", so I gave him mine. After 2 - 3 months he mentioned it was really working for him.

Just finally bought another one for myself and glad I did!

Bob

Great

THE BOB

I was amazed at how heavy duty this is , it will hold up for years. My calves were feeling it after a few minutes with this , excellent product from Westside

Exercise Bob - The BOB - Ankle Mobility Device

It has improved my ankle flexibility by a lot in a short amount of time.

Johnny Chimpo

The Best customer service out there fastest shipping everything westside barbell says about the speed of their shipping is true

Seems Good

Shipped quickly and arrived in good condition. An easy way to add volume and address ankle/calf strength for athletes.

Awesome accessory

Recovering from a serious foot/ankle injury, this tool has proven to be very helpful. Westside Barbell products are excellent

BOB

Works great now that I understand how to use it.

Great Experience!

Each and every order with Westside is a great experience. The products are fantastic, the prices are fair and the shipping is immediate. Keep it up!

I recently had a severe calf strain that I am currently in my 6th week of recovery. The BOB has been a gamechanger to allow me to get the strength and mobility back in my ankle and calf muscle again. The stretch it provides is second to none. I was so impressed at how effective it has been that I've started making my kids (young athletes) use it regularly to strengthen their ankles as well. We love the BOB!

Great equipment

Great equipment, working well to strengthen ankles and was suggested by my Chiropractor!

The BOB

It is everything they say and more! I was truely surprised by how effectively it worked and stretched the muscles and tendons in my legs and feet.

Love it!

The WSBB t-shirts are some of my favorites! They fit really well and are great quality.

The Bob is an integral part of my programming and I use it all the time.

Baire Cave approved

This bad boy is like the reverse hypers for you calves and hamstrings. I’ve just started using it and already notice huge differences as do my clients who use it

Exercise Bob - The BOB - Ankle Mobility Device

Super fast shipping

Ordered The BOB which I needed for ankle sprang therapy. Westside was very quick from order to shipment. Arrived in days, from West Coast to East Coast! The BOB is great, I like that it is firm and feet do not slip when doing toe tips, rolling the BOB over while standing on it, to get max stretch and train micro muscle stability.

Great item

Great service. Great company . It's a great item

Exercise Bob - The BOB - Ankle Mobility Device

Great product

Bob is Truly the incredible Calf Master

My volleyball team used this tool while I played in college and as an athlete past her prime I noticed that my calves were a real problem area with the tightness affecting all parts of my lower body. I ordered the Bob, remembering how affective it was at stretching those muscles a decade ago. Very happy with the customer experience on the Westside Barbell site and shipping was also quick. Very happy with my purchase, highly recommend both the Bob and Westside Barbell.

Exercise Bob - The BOB - Ankle Mobility Device

T-SHIRTS

OG Gym, Nitro, WTB & Classic Tee

Camo Tee

Vintage Tee

TANKS

Men's OG Nitro Tank

HOODIES & CREWS

Men's Hoodie

Men's Lux Hooded Sweatshirt

Crewneck Sweatshirt

BOTTOMS

Westside Barbell x PARRY Core Shorts — 7-inch Inseam

Men's Jogger

Nitro Sweatpant

Westside Men's Sweatpants

WOMEN'S

Women's Original Gym Tee

ELBOW SLEEVES

7mm Neoprene Elbow Sleeves

HOW TO MEASURE

Body Length

Chest Width

Sleeve Length

Shoulder Width

Inseam

Waist

NOT SURE WHICH SIZE TO ORDER?

Customer Reviews