Yes you can. There are a wide ranging variety of work out plans to be found online that can tailor especially to you. I would first try visiting bodybuilding.com.
There are a few places online to find workout plans for the lower back. One such website is Scooby's Work Shop, they provide a workout plan for strengthening the lower back muscles. Another website is The spine health website.
You could actually have a good cardio workout plan without using any equipment. There are exercise tips which you can read on fitwatch.com like walking, jumping jacks, push ups and so much more.
You can find the Cristiano Ronaldo workout online, by following this link http://www.ronaldo7.net/extra/training/cristiano-ronaldo-training.html Yes. The material in this link includes information about a daily routine that you would need to follow, as well as a daily meal plan.
There are many sites available that provide free workout plans. http://www.livestrong.com/workout/ provides several options. The most important thing is to find a plan that incorporates things you enjoy doing. If you don't like to run, but do like to swim find a plan that incorporates swimming in your workout.
Fitness magazine has a special article on a post pregnancy workout which was tried by four moms. The article is here: http://www.fitnessmagazine.com/health/lose-baby-weight/workouts/post-baby-workout-plan/
The P90X Workout is a 90 day plan that can be purchased on the internet. It is relatively expensive and complex and requires a serious commitment to exercise. Another is a plan by Good Housekeeping.
Whether a workout plan is safe will tend to vary by individual: what is safe for one person may not for another person. However, on sites like Women's Fitness one will find workout plans that should be safe if used sensibly.
I believe Nutrisystem can work. And if not, get creative and create your own. Find some recipes online or in a bookstory and make your own personalized menu for the week.
The better website that I have found that really explains in detail about diets and weekly plans, is this. http://www.changingshape.com/dietandnutrition/mealplans/ It has everything from 1000 calories for women to 2500 calorie diets for men. I really hope this helps.
There is a new home army workout. This is a military-style workout that is designed for you to do at home and help you get into shape as long as you follow the specific workout plan.
The website bodybuilding.com has a community section where people who have tried the John Cena workout discuss the pros and cons of it. This is helpful information for someone considering his workout plan.
The New Workout Plan was created on 2004-08-31.