class MuscleGroup(models.Model):
    name = models.CharField(max_length=50)
    descr_text = models.TextField(')
		
class Exercise(models.Model):
    name = models.CharField (max_length=50)
    muscle = models.ManyToManyField (MuscleGroup)
    descr_text = models.TextField (blank=True)
		
class Training(models.Model):
    author_user = models.ForeignKey(User)
    train_date = models.DateField()
    title = models.CharField (max_length=50, blank=True)
		
class Reps(models.Model):
    muscle_group = models.ForeignKey(MuscleGroup)
    training = models.ForeignKey(Training)
    exercise = models.ForeignKey(Exercise)
    work_count = models.IntegerField()
    work_weight = models.IntegerField()

@login_required
@csrf_exempt
def reps_add(request, training_id):
    user = request.user
    tr_list = Training.objects.filter(author_user=user)
    train = get_object_or_404 (tr_list, pk=training_id)
    RepsFormSet = inlineformset_factory(Training, Reps, extra=5)
    if request.method == 'POST':
        formset = RepsFormSet(request.POST, instance=train)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect (reverse(training_detail, args=(training_id,)))
    else:
        formset = RepsFormSet(instance=train)
    return render_to_response ('reps_add.html', {'formset':formset, 'user':user})

<form action='' method='POST'>
	{{ formset.management_form }}
    {% for form in formset %}
        {{ form.id }}
		{{ form.errors }}
		<table>
			<tr>
                <td> {{ form.muscle_group }} </td>
				<td> {{ form.exercise }} </td>
				<td> {{ form.work_count }} </td>
				<td> {{ form.work_weight }} </td>
				{% if formset.can_delete %}
					<td>Удалить :{{ form.DELETE }} </td>
				{% endif %}
			</tr>
		</table>
    {% endfor %}
	<input type = 'submit' value='Add' />
	</form>

{% for exercise in form.muscle_group.exercise_set.all %}
<td>{{ exercise }}</td>
{% endfor %}