[Need help] topic: How much exercise kids really help?

I have to write a 1000 word research about "How much exercise kids really need?".
However, I meet some difficulties regarding research's content.
I intend to divide my research into 5 paragraphs:

- Introduction.
- Benefits of physical activity for kids.
- explain some words like: aerobic, muscle-strengthening, and bone-strengthening...
- how much exercise kids really need.
- conclusion.

do I go off the topic?

If it possible, could you give me some ideas about the topic?
Thanks a lot.

you are in right track. divide your topics into subtopics with brief discription. then post it again. My suggestion;

1. Introduction.-
# What is physical exercise? ( Dictionary definition etc.)
# Physical exercise in the past and Now. ( outdoor activities and indoor activities.
how technology changing physical activities.Benefits of physical activity for kids.-
# What happen if we don't do exercise
(Obesity, heart disease, blood pressure etc. It is necesaary to develop a habit of exercising since early age. )
#advantage: healthy, fit, release of energy in creative work.

explain some words like: aerobic, muscle-strengthening, and bone-strengthening...-
# what are common exercise ( aerobic, Yoga, athletics, body building- their advantage e.g. yoga/ mediatation helps concentration, and treats diseases like...
# outdoor exercises and indoor exercises.. summer/ winter
how much exercise kids really need.-
# what experts say
#is it different for age group.
# First lady Michell Obama's efforts to keep school kids healthy. Her program etc.
conclusion
#Restate the essay prompt and summarize all your ideas in short disclosing advantages.
# is exercise only enough to be healthy. How about healthy eating habits you can write in one sentences.

Just an idea!

Thank you very much for your help.
This is my idea. It's quite similar with your idea.
Introduction:
# physical inactivity is common nowadays.
# harms of physical inactivity.
# People embark on doing exercise .

Benefits of physical activity for kids
# specific positive effects on kids.

explain some words like: aerobic, muscle-strengthening, and bone-strengthening...
# their definitions and their particular advantages.
how much exercise kids really need.
# 2 age groups (under 5 years old and 5-17 years old)
# specific recommendations for each group.
(maybe 2 paragraphs for each group.)
conclusion
#Restate the essay prompt and summarize all your ideas in short disclosing advantages.
# is exercise only enough to be healthy. How about healthy eating habits you can write in one sentences.

thanks again.

Can't wait to see your ideas in full essay in this forum. : )