There are 2 types of physical development that are most critical in Kindergarten children:
gross motor development (large muscle groups and whole body movement) - running, kicking, jumping, etc.
fine motor development (small muscles, especially those in the fingers) - zipping, shoe tying, grasping small objects like pencils and crayons
It is considered typical for girls to be more advanced with fine motor skills and boys to have more developed gross motor skills.
What you can do:
Children need time to play outside (in the yard/neighborhood and/or at the park) - running, climbing, bike riding, and other outdoor movements help children develop gross motor skills and provide exercise.
Some parents like to involve their children in team sports or dance/gymnastics. I see a lot of flyers sent home through the school (Magna Rec., Junior Jazz, etc). If you are interested in involving your child in some of those things things, you can take a look at those options.
Provide plenty of activities for children to develop fine motor muscles - PlayDoh, writing, coloring, puzzles, cutting (with child friendly scissors).
My fine motor Pinterest board has ideas of other activities you can do at home to practice fine motor skills (including a couple of interventions to try if your child has an awkward pencil grip).
What I will do:
I recognize recess as a necessity and a priority. I try to give at least 12-15 minutes of recess each school day (except for short days, which are only 2 hours - hard to fit ANYTHING in).
I provide larger pencils for writing - these are easier to grasp/manipulate and harder to break.
We do a lot of cutting, gluing, and coloring activities.
I have other toys and activities are specifically designed to improve fine motor skills (like lacing cards and puzzles). Children have a free choice time about once a week - they may choose these during that time.
Manipulating our Math counters (or any other small objects we use) also uses fine motor skills.