# 6.	Gym Session

@classmethod
def get_long_and_hard_exercises(cls):
    query = Q(duration_minutes__gt=30) & Q(difficulty_level__gte=10)
    return cls.objects.filter(query)
    
@classmethod
def get_short_and_easy_exercises(cls):
    query = Q(duration_minutes__lt=15) & Q(difficulty_level__lt=5)
    return cls.objects.filter(query)
    
@classmethod
def get_exercises_within_duration(cls, min_duration: int, max_duration: int):
    return cls.objects.filer(duration_minutes__range(min_duration, max_duration))

@classmethod
def get_exercises_with_difficulty_and_repetitions(min_difficulty: int, min_repetitions: int):
    return cls.objects.filter(difficulty_level__gte=min_difficulty, repetitions__gte=min_repetitions)