def is_recovery_exercise(ex) -> bool:
    """True for warmup/cooldown-style recovery/stretch exercises."""
    if ex is None:
        return False
    name = (getattr(ex, 'name', '') or '').lower()
    patterns = (getattr(ex, 'movement_patterns', '') or '').lower()
    if 'stretch' in name:
        return True
    blocked = (
        'mobility - static', 'static stretch', 'yoga',
        'cool down', 'cooldown', 'breathing', 'massage',
    )
    return any(token in patterns for token in blocked)