Top ten iTunes health apps of 2011

Apple recently launched its annual App Store Rewind 2011 on iTunes featuring its top picks for the year's best overall health apps for iPhone, iPad, and iPod Touch.

Topping the list is an app that offers three-dimensional views of your muscles while your work out, an app that photo-documents your meals for review by your friends, and another that offers intense, equipment-free workouts no matter what your fitness level.

iMuscle -

An on-the-go workout aid that can help you capture three-dimensional views of your muscles or body parts you want to exercise or rehabilitate. Comes complete with exercise guide, labeling, and 'medically correct' descriptions. Price: $1.99/$4.99.

Nike Training Club -

This app aims to be your customized personal trainer with 60 workouts, including new training regimens from five professional athletes. Earn app reward workouts from Rihanna's personal trainer Ary Nuñez. Free.

The Eatery -

This new app helps you photo-document everything you eat, rate it on a scale from 'fit' to 'fat,' and share with your friends for feedback. Free.

Fooducate -

Fooducate lets you scan the barcode on food products in the US to get a quick health grade from A to F. Free.

P90X -

This app allows you to keep track of your sets, reps, and weights, view your progress, log your nutrition, access workout series, and share your results. $4.99.

FitnessClass -

lets you stream workout videos over WiFi or 3G while you listen to your own music (iOS 4+) and post your workouts to Facebook and Twitter. Free.

MyFitness Pal Calorie Counter and Fitness Tracker -

This app's food database has more than 400,000 items with 'precise data' on calorie content and nutritional ingredients. Use the app to calculate your daily intake of vitamins or create your own diet and physical activity plans to lose or gain weight. Free.

Sprout -

Designed for pregnant women, Sprout offers color images and three-dimensional models of your growing baby, weight trackers, kick counter, contraction timer, and Personal MyBaby and Doctor Says sections. $3.99.

Gorilla Workout -

This app offers a fast-paced, no-equipment series of more than 40 exercises. Each exercise targets specific muscle groups to help you strengthen and tone your core, abs, chest, back, arms, and legs, and burn fat. $1.99.

Airstrip Cardiology -

An app that allows doctors to access ECG data for their patients while on the go, rather than relying on faxes or PDFs on computers, which could distort data, according to AirStrip. Free.

Next year, consumers can expect another hot year for health- and fitness-tracking sensor devices and apps. According to a December report from consumer trend firm Trendwatching. For example the number of 'health' apps in the App Store, currently around 9,000, is expected to grow to 13,000 by around June 2012.